This document presents an article from the International Journal of Fuzzy System Applications that proposes a new method called the PSK method for solving type-1 and type-3 fuzzy transportation problems. In transportation problems, supplies, demands, and costs are usually certain values, but the article considers problems where these values may be uncertain and represented by fuzzy numbers like triangular or trapezoidal fuzzy numbers. The PSK method transforms the fuzzy transportation problem into a crisp one using an existing ranking procedure so that conventional solution methods can be applied. The method differs from solving certain transportation problems only in the allocation step. The PSK method and a new operation for multiplying trapezoidal fuzzy numbers are proposed to find an optimal solution with both crisp and fuzzy components