Could you not translate yuksek as "greater" in this instance? Three is greater than two, not higher.
Shouldn't it be taller?
More people = a higher population
It is not talking about the people who live in Turkey having more body length than the people who live in Germany. It's just talking about numbers.
Would it be appropriate to use 'daha' after yuksek?
You could use it before, but never after :)
Thanks! So from this example I assume you use a noun + ablative ending + adjective for making comparisons?
Yep. X'DAn (daha) Y :) Where X is a noun and Y is an adjective.