Directions; find the missing term to make proportion.
11. 8 : n = 6 : 18
12. 11 : 15 = n : 25
13. 9 : n = 81 : 18
14. 12 : 24 = 16 : n
15. 17 : n = 51 : 297
16. 27 : 36 = n : 12
17. 5 : 12 = 20 : n
18. n : 70 = 12 : 14
19. 10 : n = 15 : 30
20. 8 : 12 = 4 : n
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