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Finding the Fourth Proportional to 16,691,879.80, 25,037,819.70 and 12,387,207.70

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Solution

The fourth proportional to 16,691,879.80, 25,037,819.70 and 12,387,207.70 is: 18,580,811.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,691,879.80 : 25,037,819.70 = 12,387,207.70 : x
  2. Step 2: Convert to fraction form
    16,691,879.80/25,037,819.70 = 12,387,207.70/x
  3. Step 3: Cross multiply
    16,691,879.80x = 25,037,819.70 × 12,387,207.70
  4. Step 4: Simplify right side
    16,691,879.80x = 310,148,672,979,051.69
  5. Step 5: Solve for x
    x = 310,148,672,979,051.69/16,691,879.80
  6. Step 6: Final answer
    x = 18,580,811.55

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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.