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Finding the Fourth Proportional to 8,874.64, 13,306.47 and 4,981.78

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Solution

The fourth proportional to 8,874.64, 13,306.47 and 4,981.78 is: 7,469.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,874.64 : 13,306.47 = 4,981.78 : x
  2. Step 2: Convert to fraction form
    8,874.64/13,306.47 = 4,981.78/x
  3. Step 3: Cross multiply
    8,874.64x = 13,306.47 × 4,981.78
  4. Step 4: Simplify right side
    8,874.64x = 66,289,906.12
  5. Step 5: Solve for x
    x = 66,289,906.12/8,874.64
  6. Step 6: Final answer
    x = 7,469.59

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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.