Question

Use the cross product property to solve the proportion

5/r = 9/10​

Answer 1

`5.\overline{55}` or
`5(5)/(9)`

Explanation:

`(5)/(r) =(9)/(10)`

We multiply the cross values of 5 and 10

5 × 10 = 50

Now we divide by the remaining number, 9

`50 / 9 = 5.555555...`

So, r =
`5.\overline{55}`

As a fraction, this is
`5(5)/(9)`

Hope this helped!

Answer 2

5 5/9 = r

Explanation:

5/r = 9/10​

Using cross products

5 * 10 = 9 * r

50 = 9r

Divide by 9

50/9 = r

5 5/9 = r