Find the mean proportional of 8a² and (18/a⁴), where a is a positive number. SSC SSC CGL Tier 1 Easy Number System MCQ Question Find the mean proportional of 8a² and (18/a⁴), where a is a positive number. Options A. 12 / a² B. 12a C. 12a² D. 12 / a mean proportionalnumber systemalgebra