Finding the Fourth Proportional to 21,515,787.60, 32,230,135.80 and 13,403,864.40
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Solution
The fourth proportional to 21,515,787.60, 32,230,135.80 and 13,403,864.40 is: 20,078,668.65
Step by Step Solution
- Step 1: Write the proportion equation
21,515,787.60 : 32,230,135.80 = 13,403,864.40 : x - Step 2: Convert to fraction form
21,515,787.60/32,230,135.80 = 13,403,864.40/x - Step 3: Cross multiply
21,515,787.60x = 32,230,135.80 × 13,403,864.40 - Step 4: Simplify right side
21,515,787.60x = 432,008,369,856,785.56 - Step 5: Solve for x
x = 432,008,369,856,785.56/21,515,787.60 - Step 6: Final answer
x = 20,078,668.65
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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.