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Finding the Fourth Proportional to 8,906.68, 13,366.50 and 3,981.88

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Solution

The fourth proportional to 8,906.68, 13,366.50 and 3,981.88 is: 5,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,906.68 : 13,366.50 = 3,981.88 : x
  2. Step 2: Convert to fraction form
    8,906.68/13,366.50 = 3,981.88/x
  3. Step 3: Cross multiply
    8,906.68x = 13,366.50 × 3,981.88
  4. Step 4: Simplify right side
    8,906.68x = 53,223,799.02
  5. Step 5: Solve for x
    x = 53,223,799.02/8,906.68
  6. Step 6: Final answer
    x = 5,975.72

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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.