Determine whether each pair of ratios forms a proportion. 1. 17/10 = 12/5 2. 6/9 = 12/18 3. 8/12 = 10/15 4....

Determine whether each pair of ratios forms a proportion.
1. 17/10 = 12/5
2. 6/9 = 12/18
3. 8/12 = 10/15
4. 7/15 = 13/32
5. 7/9 = 49/63
6. 8/24 = 12/28
7. 4/7 = 12/71
8. 20/35 = 30/45
9. 18/24 = 3/4
Solve each proportion.
10. x/5 = 15/25
11. 3/4 = 12/c
12. 6/9 = 10/r
13. 16/24 = x/15
14. 5/8 = s/12
15. 14/t = 10/11
16. w/6 = 2.8/7
17. 5/y = 7/16.8
18. x/18 = 7/36