Proportions

Front

What is a proportion?

Back

When two ratios are equivalent and show the same value.

Front

What is a ratio?

Back

A comparison of two quantities by division.

Front

How do you solve a proportion?

Back

Cross-multiply the two ratios and set them equal to each other.

Front

What is the cross-multiplication method?

Back

A method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other.

Front

If a/b = c/d, what is the value of ad?

Back

ad = bc (Cross-multiplication property of proportions).

Front

What is an equivalent ratio?

Back

Two ratios that express the same relationship between numbers.

Front

How can you find an equivalent ratio?

Back

By multiplying or dividing both terms of the ratio by the same non-zero number.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first term is the numerator and the second term is the denominator.

Front

If 3/4 = x/16, what is x?

Back

x = 12 (Cross-multiply and solve for x).

Front

What is a unit rate?

Back

A ratio that compares a quantity to one unit of another quantity.