Solving Proportions - Word Problems!

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 two ratios and then solve for the unknown.

Front

What does it mean if two quantities are in a ratio of 1 to 1?

Back

It means that for every unit of one quantity, there is an equal unit of the other quantity.

Front

If the ratio of boys to girls is 1 to 1 and there are 42 girls, how many boys are there?

Back

42 boys.

Front

What is the formula to find the cost per item?

Back

Cost per item = Total cost / Number of items.

Front

If a box of 4 cupcakes costs $9, how much does 1 cupcake cost?

Back

$2.25 per cupcake.

Front

How do you find the number of items needed based on a given ratio?

Back

Use the ratio to set up a proportion and solve for the unknown quantity.

Front

If Sarah used 9 red beads and 12 blue beads, what is the ratio of red to blue beads?

Back

The ratio is 9:12 or simplified, 3:4.

Front

If Sarah has 15 red beads, how many blue beads does she need to maintain the same ratio?

Back

20 blue beads.

Front

What is the relationship between distance, rate, and time?

Back

Distance = Rate x Time.