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Finding the Fourth Proportional to 9,361,794.78, 12,919,324.57 and 5,231,894.90

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Solution

The fourth proportional to 9,361,794.78, 12,919,324.57 and 5,231,894.90 is: 7,220,041.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361,794.78 : 12,919,324.57 = 5,231,894.90 : x
  2. Step 2: Convert to fraction form
    9,361,794.78/12,919,324.57 = 5,231,894.90/x
  3. Step 3: Cross multiply
    9,361,794.78x = 12,919,324.57 × 5,231,894.90
  4. Step 4: Simplify right side
    9,361,794.78x = 67,592,548,251,551.33
  5. Step 5: Solve for x
    x = 67,592,548,251,551.33/9,361,794.78
  6. Step 6: Final answer
    x = 7,220,041.65

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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.