The amount of vitamin A in a liter of goat milk will be 2080 IU.
Step-by-step explanation
The ratio of the amount of vitamin A in cow milk to the amount of vitamin A in goat milk is
![3:4](https://img.qammunity.org/2019/formulas/mathematics/high-school/oduiy96mfk2ja2idj9s0nnbfj7aiu8pv33.png)
So lets assume, the amount of vitamin A in a liter of cow milk is
and
![4x](https://img.qammunity.org/2019/formulas/mathematics/middle-school/37r4d3qlcax5asxoom7mo695u1afouvob6.png)
Given that, a liter of cow milk has 1560 IU of vitamin A. That means.......
![3x=1560\\ \\ x=(1560)/(3)=520](https://img.qammunity.org/2019/formulas/mathematics/middle-school/a4nnj5gvfnsrwf65ve1d0wnt8rzs9vquci.png)
So, the amount of vitamin A in a liter of goat milk will be:
IU.