Set Up and Solve a Proportion for Each Application Problem $$\begin{aligned}& \frac{6}{10}=\frac{x}{12} \\& 6 \cdot x=10 \cdot 12 \\& 6 \cdot x=120 \\& x=\frac{120}{6} \\& x=20\end{aligned}$$

Set up and solve a proportion for each application problem.
-Find the error in the following solution, and complete the solution correctly.
$$\begin{aligned}& \frac{6}{10}=\frac{x}{12} \\& 6 \cdot x=10 \cdot 12 \\& 6 \cdot x=120 \\& x=\frac{120}{6} \\& x=20\end{aligned}$$