Solve Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

If a/b = c/d, what is the cross-multiplication method?

Back

The cross-multiplication method states that a * d = b * c.

Front

Solve for C in the proportion: 4/8 = C/16.

Back

C = 8.

Front

Solve for M in the proportion: 5/10 = M/20.

Back

M = 10.

Front

Solve the proportion: 3/5 = 15/X.

Back

X = 25.

Front

Solve for X in the proportion: 12/X = 4/8.

Back

X = 6.

Front

Solve for Z in the proportion: 7/Z = 21/3.

Back

Z = 1.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

What is the first step in solving a proportion?

Back

Identify the two ratios and set them equal to each other.