Question

7. In an orchestra, the ratio of trombones to violas is 4:6. There are 9 violas. Write and solve a proportion to

determine how many trombones are in the orchestra.

Answer 1

Answer: 6 trombones

Explanation:

We can set up a proportion.

Let x be the number of trombones there are.

`(4 trombones)/(6violas) = (x trombones)/(9 violas)`

We can cross multiply:

4*9 = 6x

6x = 36

Divide both sides by 6:

x = 6