Students can use this worksheet to practice identifying equivalent ratios and solving for unknown variables in proportion equations.

Part I: Determine whether or not each pair of ratios is a proportion.

1.) 3/5 and 8/24 → Not a proportion
2.) 4/9 and 9/10 → Not a proportion
3.) 18/41 and 3/7 → Not a proportion
4.) 3/2 and 27/18 → Proportion
5.) 4/2 = 18/9 → Proportion
6.) 5/6 and 15/18 → Proportion
7.) 7/8 and 1/2 → Not a proportion
8.) 24/32 and 27/36 → Proportion

Part II: Solve for x in each proportion.

9.) 1/2 = x/10 → x = 5
10.) 3/5 = 10/x → x = 50/3
11.) 5/7 = 22/33 → Not a proportion (x cannot be solved as written; likely typo)
12.) 1/x = 7/63 → x = 9
13.) 3/5 = x/60 → x = 36
14.) 18/x = 13/16 → x = 288/13
15.) x/7 = 48/56 → x = 6
16.) 5/x = 10/22 → x = 11