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Finding the Fourth Proportional to 18,524.97, 27,781.11 and 7,428.78

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Solution

The fourth proportional to 18,524.97, 27,781.11 and 7,428.78 is: 11,140.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,524.97 : 27,781.11 = 7,428.78 : x
  2. Step 2: Convert to fraction form
    18,524.97/27,781.11 = 7,428.78/x
  3. Step 3: Cross multiply
    18,524.97x = 27,781.11 × 7,428.78
  4. Step 4: Simplify right side
    18,524.97x = 206,379,754.35
  5. Step 5: Solve for x
    x = 206,379,754.35/18,524.97
  6. Step 6: Final answer
    x = 11,140.63

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1.5x scale

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.