tolong ya no. 1,2,3 Makasih

no 1
[tex] \frac{36}{45} = \frac{17500}{x} \\ \frac{4}{5} = \frac{17500}{x} \\ 4 \times x = 17500 \times 5 \\ x = \frac{87500}{4} = 21875[/tex]
semoga bermanfaat