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Finding the Fourth Proportional to 21,152,425.90, 31,678,872.45 and 21,152,425.90

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Solution

The fourth proportional to 21,152,425.90, 31,678,872.45 and 21,152,425.90 is: 31,678,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152,425.90 : 31,678,872.45 = 21,152,425.90 : x
  2. Step 2: Convert to fraction form
    21,152,425.90/31,678,872.45 = 21,152,425.90/x
  3. Step 3: Cross multiply
    21,152,425.90x = 31,678,872.45 × 21,152,425.90
  4. Step 4: Simplify right side
    21,152,425.90x = 670,085,002,094,176.38
  5. Step 5: Solve for x
    x = 670,085,002,094,176.38/21,152,425.90
  6. Step 6: Final answer
    x = 31,678,872.45

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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.