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Finding the Fourth Proportional to 18,105.31, 27,134.88 and 15,755.50

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Solution

The fourth proportional to 18,105.31, 27,134.88 and 15,755.50 is: 23,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,105.31 : 27,134.88 = 15,755.50 : x
  2. Step 2: Convert to fraction form
    18,105.31/27,134.88 = 15,755.50/x
  3. Step 3: Cross multiply
    18,105.31x = 27,134.88 × 15,755.50
  4. Step 4: Simplify right side
    18,105.31x = 427,523,601.84
  5. Step 5: Solve for x
    x = 427,523,601.84/18,105.31
  6. Step 6: Final answer
    x = 23,613.16

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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.