For this case we can make the following rule of three:
80 teachers -----------------> 4 teacher assistants
33500 teachers ------------> x
From here, we clear the value of x.
We have then:
![x = (33500/80) * (4) x = 1675](https://img.qammunity.org/2019/formulas/mathematics/high-school/aqv5fylyvy0zwd4es2l9nfbyjy8nie1khk.png)
Therefore we have 1675 teacher assistants in the county.
Answer:
There are 1675 teacher assistants in the county.