Proportion Word Problems

Front

What is a proportion?

Back

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

Front

How do you set up a proportion from a word problem?

Back

Identify the two quantities that are being compared and set them equal to each other as a fraction.

Front

What is the cross-multiplication method?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one fraction by the denominator of the other.

Front

If 3 out of 5 students prefer chocolate ice cream, how many students out of 25 would prefer chocolate?

Back

15 students.

Front

What is a scale model?

Back

A scale model is a physical representation of an object that maintains accurate relationships between its dimensions.

Front

How do you find the length of a scale model?

Back

Use the scale ratio to convert the actual length into the model length.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

If a recipe calls for 2 cups of sugar for 4 cups of flour, how much sugar is needed for 10 cups of flour?

Back

5 cups of sugar.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit.

Front

How do you determine which option is a better buy?

Back

Calculate the unit price for each option and compare them.