Finding the Fourth Proportional to 21,392,698.52, 29,522,327.10 and 13,128,627.08
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Solution
The fourth proportional to 21,392,698.52, 29,522,327.10 and 13,128,627.08 is: 18,117,752.78
Step by Step Solution
- Step 1: Write the proportion equation
21,392,698.52 : 29,522,327.10 = 13,128,627.08 : x - Step 2: Convert to fraction form
21,392,698.52/29,522,327.10 = 13,128,627.08/x - Step 3: Cross multiply
21,392,698.52x = 29,522,327.10 × 13,128,627.08 - Step 4: Simplify right side
21,392,698.52x = 387,587,623,029,677.88 - Step 5: Solve for x
x = 387,587,623,029,677.88/21,392,698.52 - Step 6: Final answer
x = 18,117,752.78
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.