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Finding the Fourth Proportional to 13,550.59, 18,700.54 and 7,581.90

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Solution

The fourth proportional to 13,550.59, 18,700.54 and 7,581.90 is: 10,463.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,550.59 : 18,700.54 = 7,581.90 : x
  2. Step 2: Convert to fraction form
    13,550.59/18,700.54 = 7,581.90/x
  3. Step 3: Cross multiply
    13,550.59x = 18,700.54 × 7,581.90
  4. Step 4: Simplify right side
    13,550.59x = 141,785,624.23
  5. Step 5: Solve for x
    x = 141,785,624.23/13,550.59
  6. Step 6: Final answer
    x = 10,463.43

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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.