Are these proportional?
2: 3 and 4: 6

1: 4 and 6: 18

3: 5 and 1: 3

2: 5 and 8: 20

4: 9 and 12: 27

6: 15 and 2: 5

Step-by-step explanation:

2:3 and 4:6 is proportional because if you simplify 4:6 it will equal 2:3.

1:4 and 6:18 is not proportional because if you simplify you would not get 1:4.

3:5 and 1:3 is not proportional because you can't simplify it any further and they do not equal each other.

2:5 and 8:20 is proportional because if you take 2:5 and multiply each number by 4 you would get 8:20.

4:9 and 12:27 is proportional because you can simplify 12:27 and get 4:9.

6:15 and 2:5 is proportional because you can multiply 2:5 by 3 and get 6:15.

-9

step-by-step explanation: