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Finding the Fourth Proportional to 18,469.60, 27,713.50 and 11,447.70

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Solution

The fourth proportional to 18,469.60, 27,713.50 and 11,447.70 is: 17,177.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,469.60 : 27,713.50 = 11,447.70 : x
  2. Step 2: Convert to fraction form
    18,469.60/27,713.50 = 11,447.70/x
  3. Step 3: Cross multiply
    18,469.60x = 27,713.50 × 11,447.70
  4. Step 4: Simplify right side
    18,469.60x = 317,255,833.95
  5. Step 5: Solve for x
    x = 317,255,833.95/18,469.60
  6. Step 6: Final answer
    x = 17,177.19

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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.