Set Up and Solve a Proportion for Each Application Problem $\frac{20}{30}=\frac{50}{x}$

Set up and solve a proportion for each application problem.
-Which proportion is correct for this application problem? Bruce can chop 20 logs in 30 minutes. How many logs can Bruce chop in 50 minutes?

A) $\frac{20}{30}=\frac{50}{x}$
B) $\frac{20}{30}=\frac{x}{50}$
C) $\frac{20}{50}=\frac{x}{30}$
D) $\frac{30}{50}=\frac{x}{20}$