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MATEMÁTICA FINANCIERA
PRÁCTICA No. 1
1.Cuál es el monto de intereses a pagar por un crédito de ¢500.000 a 10 meses plazo con
una tasa de interés del 20% anual?
𝐼 = 𝐶 ∗ 𝑖 ∗ 𝑡
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝐼 = 500.000 ∗ 0,20 ∗
10
12
= 83.333,33
2. Determine el valor al vencimiento a pagar por un crédito de $40.000 con intereses del
12% anual a un plazo de 5 meses.
𝑆 = 𝐶(1 + 𝑖 ∗ 𝑡)
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝑆 = 40.000 (1 + 0.12
5
12
) = 42.000
3. ¿Qué tasa de interés anual se pagó en una inversión de ¢1.200.000, si después de un
plazo de 6 meses, se acumularon ¢1.260.000?
𝑖 =
𝐼
𝐶 ∗ 𝑡
=
60.000
1.200.000 ∗
6
12
= 0.10 = 10%
4. Determine el monto de intereses a pagar por una inversión de ¢150.000 a 80 días con
intereses del 6% anual. (Utilice interés simple exacto).
𝐼 = 𝐶 ∗ 𝑖 ∗ 𝑡
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝐼 = 150.000 ∗ 0.06 ∗
80
365
= 1.972,60
5. ¿Cuánto tiempo se requiere para que un capital se triplique, si le reconocen intereses
del 12,5% anual?
𝑡 =
𝐼
𝐶 ∗ 𝑖
=
2
1 ∗ 0.125
= 16 𝑎ñ𝑜𝑠
6.¿Qué capital fue necesario invertir en una financiera que paga el 8% anual, si después
de 540 días se acumularon en la cuenta ¢280.000? (Utilice interés simple ordinario)
𝐶 = 𝑆(1 + 𝑖)−1
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝐶 = 280.000 (1 + 0.08
540
360
)
−1
= 250.000
7. ¿Qué tasa de interés anual pagó un banco por un depósito de ¢425.000 a un plazo de
año y medio, para que se acumulara un total de ¢482.375?
𝑖 =
𝐼
𝐶 ∗ 𝑡
=
57.375
425.000 ∗ 1.5
= 0.09 = 9%
8. ¿En cuánto tiempo un depósito de $20.000 se convertirá en $20.600, si le pagan
intereses del 4% anual?
𝑡 =
𝐼
𝐶 ∗ 𝑖
=
600
20.000 ∗ 0.04
= 9 𝑚𝑒𝑠𝑒𝑠
9. ¿Cuánto debería de depositar una empresa hoy en un fondo de inversión, si desea
acumular en un año ¢2.762.500 y la tasa de interés que le ofrecen es del 10,50% anual?
𝐶 = 𝑆(1 + 𝑖 ∗ 𝑡)−1
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝐶 = 2.762.500(1 + 0.1050 ∗ 1)−1
= 2.500.000
10. ¿Cuál es el valor futuro (acumulado) a pagar por un crédito de $70.000 con intereses
del 8% anual, firmado el 5 de diciembre 2017 y con vencimiento el 2 de agosto del 2018?
(Utilice interés simple ordinario).
𝑆 = 𝐶(1 + 𝑖 ∗ 𝑡)
𝑖𝑚𝑝𝑙𝑖𝑐𝑎
⇒ 𝑆 = 70.000(1 + 0.08 ∗
240
360
) = 73.686,67
R/ $73.686,67
Elaborado por: Ricardo Machado Fallas

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Solución práctica 1

  • 1. MATEMÁTICA FINANCIERA PRÁCTICA No. 1 1.Cuál es el monto de intereses a pagar por un crédito de ¢500.000 a 10 meses plazo con una tasa de interés del 20% anual? 𝐼 = 𝐶 ∗ 𝑖 ∗ 𝑡 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝐼 = 500.000 ∗ 0,20 ∗ 10 12 = 83.333,33 2. Determine el valor al vencimiento a pagar por un crédito de $40.000 con intereses del 12% anual a un plazo de 5 meses. 𝑆 = 𝐶(1 + 𝑖 ∗ 𝑡) 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝑆 = 40.000 (1 + 0.12 5 12 ) = 42.000 3. ¿Qué tasa de interés anual se pagó en una inversión de ¢1.200.000, si después de un plazo de 6 meses, se acumularon ¢1.260.000? 𝑖 = 𝐼 𝐶 ∗ 𝑡 = 60.000 1.200.000 ∗ 6 12 = 0.10 = 10% 4. Determine el monto de intereses a pagar por una inversión de ¢150.000 a 80 días con intereses del 6% anual. (Utilice interés simple exacto). 𝐼 = 𝐶 ∗ 𝑖 ∗ 𝑡 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝐼 = 150.000 ∗ 0.06 ∗ 80 365 = 1.972,60 5. ¿Cuánto tiempo se requiere para que un capital se triplique, si le reconocen intereses del 12,5% anual? 𝑡 = 𝐼 𝐶 ∗ 𝑖 = 2 1 ∗ 0.125 = 16 𝑎ñ𝑜𝑠 6.¿Qué capital fue necesario invertir en una financiera que paga el 8% anual, si después de 540 días se acumularon en la cuenta ¢280.000? (Utilice interés simple ordinario) 𝐶 = 𝑆(1 + 𝑖)−1 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝐶 = 280.000 (1 + 0.08 540 360 ) −1 = 250.000
  • 2. 7. ¿Qué tasa de interés anual pagó un banco por un depósito de ¢425.000 a un plazo de año y medio, para que se acumulara un total de ¢482.375? 𝑖 = 𝐼 𝐶 ∗ 𝑡 = 57.375 425.000 ∗ 1.5 = 0.09 = 9% 8. ¿En cuánto tiempo un depósito de $20.000 se convertirá en $20.600, si le pagan intereses del 4% anual? 𝑡 = 𝐼 𝐶 ∗ 𝑖 = 600 20.000 ∗ 0.04 = 9 𝑚𝑒𝑠𝑒𝑠 9. ¿Cuánto debería de depositar una empresa hoy en un fondo de inversión, si desea acumular en un año ¢2.762.500 y la tasa de interés que le ofrecen es del 10,50% anual? 𝐶 = 𝑆(1 + 𝑖 ∗ 𝑡)−1 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝐶 = 2.762.500(1 + 0.1050 ∗ 1)−1 = 2.500.000 10. ¿Cuál es el valor futuro (acumulado) a pagar por un crédito de $70.000 con intereses del 8% anual, firmado el 5 de diciembre 2017 y con vencimiento el 2 de agosto del 2018? (Utilice interés simple ordinario). 𝑆 = 𝐶(1 + 𝑖 ∗ 𝑡) 𝑖𝑚𝑝𝑙𝑖𝑐𝑎 ⇒ 𝑆 = 70.000(1 + 0.08 ∗ 240 360 ) = 73.686,67 R/ $73.686,67 Elaborado por: Ricardo Machado Fallas