Finding the Fourth Proportional to 21,387,331.60, 32,077,060.80 and 13,285,808.80
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Solution
The fourth proportional to 21,387,331.60, 32,077,060.80 and 13,285,808.80 is: 19,926,267.78
Step by Step Solution
- Step 1: Write the proportion equation
21,387,331.60 : 32,077,060.80 = 13,285,808.80 : x - Step 2: Convert to fraction form
21,387,331.60/32,077,060.80 = 13,285,808.80/x - Step 3: Cross multiply
21,387,331.60x = 32,077,060.80 × 13,285,808.80 - Step 4: Simplify right side
21,387,331.60x = 426,169,696,654,775.06 - Step 5: Solve for x
x = 426,169,696,654,775.06/21,387,331.60 - Step 6: Final answer
x = 19,926,267.78
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.