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Finding the Fourth Proportional to 16,691,885.80, 25,037,828.70 and 12,387,213.70

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Solution

The fourth proportional to 16,691,885.80, 25,037,828.70 and 12,387,213.70 is: 18,580,820.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,691,885.80 : 25,037,828.70 = 12,387,213.70 : x
  2. Step 2: Convert to fraction form
    16,691,885.80/25,037,828.70 = 12,387,213.70/x
  3. Step 3: Cross multiply
    16,691,885.80x = 25,037,828.70 × 12,387,213.70
  4. Step 4: Simplify right side
    16,691,885.80x = 310,148,934,690,893.19
  5. Step 5: Solve for x
    x = 310,148,934,690,893.19/16,691,885.80
  6. Step 6: Final answer
    x = 18,580,820.55

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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.