The ratios 3:9, 4:12, 5:15, and 6:18 are a pattern of equivalent ratios in the table below. 1

11
22
3 3

2. 34 5 6 7 8 9
2 3 4 5 6 7
8 9
4 6 8 10 12 14 16 18
69 12 15 18 21 24 27
8 12 16 20 24 28 32 36
10 15 20 25 30 35 40 45
12 18 24 30 36 42 48 54
14 21 28 35 22 4956 63
16 24 32 40 48 56 64 72
18 27 36 45 54 63 72 81
5
5
6
6
7
7
8
8
9
9
Which is another ratio in this pattern?
O3:1
O6:12
O 7:21
O24:27