Solving Simple 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 simple proportion?

Back

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

Front

What does cross-multiplication mean?

Back

Cross-multiplication means multiplying the numerator of one ratio by the denominator of the other ratio.

Front

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

Back

The cross-multiplication equation is a * d = b * c.

Front

What is the value of w if 3/w = 1/8?

Back

w = 24.

Front

What is the value of n if 2/n = 1/2?

Back

n = 4.

Front

What is the value of a if 6/a = 1/7?

Back

a = 42.

Front

What is the value of n if 3/n = 3/6?

Back

n = 2.

Front

What is the value of f if 12/f = 2/4?

Back

f = 6.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.