Practice solving ratio and proportion problems in math

**Quick Math Guide**

*∷ In a proportion, the product of extremes = product of means*
*∷ (First term) x (Fourth term) = (Second term) x (Third term)*

**Practice Worksheet**

1. Find the value of x if 9:15 :: 3:x
2. Find the value of x if 51:85 :: 57:x
3. Find the value of x if 13:x :: 1:7
4. Find the value of x if 12:11 :: x:132
5. If a:b = 4:5 and b:c = 6:7. Find a:c.
Answers:

1. 5

2. 95

3. 91

4. 144

5. 24:35