Answer:
[tex]D.\frac{5}{3}=\frac{20}{x}[/tex]
Step-by-step explanation:
[tex]We\ are\ given\ that,\\Ratio\ from\ the\ number\ of\ oranges\ to\ the\ number\ of\ tangerines\ in\ the\ box=5:3=\frac{5}{3} \\Hence,\\No.\ of\ Oranges\ in\ the\ box=20\\Hence,\\In\ order\ to\ set\ up\ a\ proportion, we\ need\ to\ follow\ the\ equation:\\\frac{x_1}{y_1}=\frac{x_2}{y_2} \\[/tex]
[tex]Here,\\x_1=Rational\ No.\ of\ oranges\ =5\\y_1=Rational\ No.\ of\ Tangerines\ =3\\x_2=Actual\ no.\ of\ oranges\ =20\\y_2=Actual\ no.\ of\ Tangerines =x\\Hence,\\\frac{5}{3}=\frac{20}{x}[/tex]
