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Finding the Fourth Proportional to 8,981.64, 13,472.40 and 7,439.40

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Solution

The fourth proportional to 8,981.64, 13,472.40 and 7,439.40 is: 11,159.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.64 : 13,472.40 = 7,439.40 : x
  2. Step 2: Convert to fraction form
    8,981.64/13,472.40 = 7,439.40/x
  3. Step 3: Cross multiply
    8,981.64x = 13,472.40 × 7,439.40
  4. Step 4: Simplify right side
    8,981.64x = 100,226,572.56
  5. Step 5: Solve for x
    x = 100,226,572.56/8,981.64
  6. Step 6: Final answer
    x = 11,159.05

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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.