To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method.

Question

To solve for the following proportion, you could use equivalent ratios, divide out the known ratio, or use cross products. Choose one of these methods to solve for t. Show your work and explain why you chose that method.
 18/5 = 4/t

Ms. Sue · Answer

I learned the cross-multiply method over 60 years ago. I can apply it to many types of problems. 18/5 = 4/t 18t = 20 t = 20/18 = 1 2/18 = 1 1/9