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Finding the Fourth Proportional to 7,187,876.89, 9,919,671.82 and 3,924,994.39

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Solution

The fourth proportional to 7,187,876.89, 9,919,671.82 and 3,924,994.39 is: 5,416,711.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187,876.89 : 9,919,671.82 = 3,924,994.39 : x
  2. Step 2: Convert to fraction form
    7,187,876.89/9,919,671.82 = 3,924,994.39/x
  3. Step 3: Cross multiply
    7,187,876.89x = 9,919,671.82 × 3,924,994.39
  4. Step 4: Simplify right side
    7,187,876.89x = 38,934,656,209,529.43
  5. Step 5: Solve for x
    x = 38,934,656,209,529.43/7,187,876.89
  6. Step 6: Final answer
    x = 5,416,711.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.