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Finding the Fourth Proportional to 10,379,862.40, 15,569,793.60 and 9,791,996.80

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Solution

The fourth proportional to 10,379,862.40, 15,569,793.60 and 9,791,996.80 is: 14,687,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,379,862.40 : 15,569,793.60 = 9,791,996.80 : x
  2. Step 2: Convert to fraction form
    10,379,862.40/15,569,793.60 = 9,791,996.80/x
  3. Step 3: Cross multiply
    10,379,862.40x = 15,569,793.60 × 9,791,996.80
  4. Step 4: Simplify right side
    10,379,862.40x = 152,459,369,107,860.50
  5. Step 5: Solve for x
    x = 152,459,369,107,860.50/10,379,862.40
  6. Step 6: Final answer
    x = 14,687,995.20

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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.