4. Which ratios form a proportion? Use cross products to test each pair.A. 9/17 27/50B. 12/35 24/75C. 15/55 33/121D. 12/35 20/70​

The right answer is Option C.Step-by-step explanation:A. 9/17 and 27/50Using cross product;[tex]\frac{9}{17}=\frac{27}{50}\\9*50=17*27\\450=459[/tex]The ratio does not form proportion.B. 12/35 and 24/75[tex]\frac{12}{35}=\frac{24}{75}\\12*75=24*35\\900=840[/tex]The ratio does not form proportion.C. 15/55 and  33/121[tex]\frac{15}{55}=\frac{33}{121}\\15*121=33*55\\1815=1815[/tex]The ratio form a proportion.D. 12/35 and 20/70​[tex]\frac{12}{35}=\frac{20}{70}\\12*70=20*35\\840=700[/tex]The ratio does not form proportion.The right answer is Option C.Keywords: ratio, proportionLearn more about proportions at:brainly.com/question/3358617brainly.com/question/3411756#LearnwithBrainly