Solving 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 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

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 of one.

Front

How do you find the unit price?

Back

To find the unit price, divide the total price by the number of units.

Front

If 50 apples cost $25, what is the cost of 1 apple?

Back

The cost of 1 apple is $0.50.

Front

If a car travels 120 miles in 3 hours, what is its speed?

Back

The speed is 40 miles per hour.

Front

If 5 ice cream cones are sold for every 3 brownies, what is the ratio of ice cream cones to brownies?

Back

The ratio is 5:3.

Front

If 24 brownies are sold, how many ice cream cones are sold?

Back

If 24 brownies are sold, 40 ice cream cones are sold.

Front

What is the formula for finding the total cost based on unit price?

Back

Total Cost = Unit Price x Number of Units.