Find the value of N to make the proportion correct. 16. 6: N = 8:12
17. N:7 = 6:21
18. 6:N = 3:5
19. 3:8= 6:N
20. 2:7 = N:21
21. N:9 = 8:3
22. N:4 = 15: 12
23. 4:6= N:18
24. 4:12 = 1:N
25. 5:10= 2 :N
17. N:7 = 6:21
18. 6:N = 3:5
19. 3:8= 6:N
20. 2:7 = N:21
21. N:9 = 8:3
22. N:4 = 15: 12
23. 4:6= N:18
24. 4:12 = 1:N
25. 5:10= 2 :N
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Answer:
16. 6:N = 8:12
8N = 6 × 12
8N = 72
8N/8 = 72/8
N = 9
17. N:7 = 6:21
21N = 7 × 6
21N = 42
21N/21 = 42/21
N = 2
18. 6:N = 3:5
3N = 6 × 5
3N = 30
3N/3 = 30/3
N = 10
19. 3:8 = 6:N
3N = 8 × 6
3N = 48
3N/3 = 48/3
N = 16
20. 2:7 = N:21
7N = 21 × 2
7N = 42
7N/7 = 42/7
N = 6
21. N:9 = 8:3
3N = 9 × 8
3N = 72
3N/3 = 72/3
N = 24
22. N:4 = 15:12
12N = 15 × 4
12N = 60
12N/12 = 60/12
N = 5
23. 4:6 = N:18
6N = 18 × 4
6N = 72
6N/6 = 72/6
N = 12
24. 4:12 = 1:N
4N = 12 × 1
4N = 12
4N/4 = 12/4
N = 3
25. 5:10 = 2:N
5N = 10 × 2
5N = 20
5N/5 = 20/5
N = 4