Solving Proportion Problems

Lesson 1

Problem: Solve 12/a = 44/52

                                                            Solution           Cross multiply: 12 x 52 = 44 x a

Step 1:

                                                            Solution            Simplifying     12 x 52 = a x 44

Step 2:

                                                            Solution           Multiply 12 x 52    624 = a x 44

Step 3:

Solution Reorder the terms for easier multiplication: 624 = 44a

Step 4:

Solution Solving 624 = 44a

Step 5:

Solution Dividing, a = 624 / 44

Step 6:

Solution Answer: a = 156/11

Step7:

Complete

Try two practice problems:

Solve for y.

A. 7/5 = y/3

B. y/5 = 9/5