allery$4$, $9$ અને $12$ નું ચોથું પ્રમાણપદ શોધો.
A$18$
B$21$
C$24$
D$27$
Answer & Solution
Correct answer: D. $27$
જો $4 : 9 = 12 : x$ હોય, તો મધ્યમ પદોનો ગુણાકાર = અંતિમ પદોનો ગુણાકારના નિયમ મુજબ, $4x = 9 \times 12 = 108$, તેથી $x = 27$.
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