4-11: 3 SEE ANSWER
Answer: 4
To make a perfect fourth the ratio of the intervals must be 4/3.
| Ratio | Does it make a P4? |
|---|---|
| (4/3) divided by 1 = (4/3) | Yes |
| (3/2) divided by (9/8) = (4/3) | Yes |
| (27/16) divided by (4/3) = (4/3) | Yes |
| (243/129) divided by (4/3) = (729/512) | No |
| 2 divided by (3/2) = (4/3) | Yes |
| 1 divided by (27/16) = (16/27) | No |
| (9/8) divided by (243/128) = (16/27) | No |
| (81/64) divided by 2 = (81/128) | No |
There are four combinations which make a perfect fourth.
- REDIRECT 4-11 Assessment