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Finding the Fourth Proportional to 31,507.67, 43,481.56 and 18,081.38

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Solution

The fourth proportional to 31,507.67, 43,481.56 and 18,081.38 is: 24,952.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,507.67 : 43,481.56 = 18,081.38 : x
  2. Step 2: Convert to fraction form
    31,507.67/43,481.56 = 18,081.38/x
  3. Step 3: Cross multiply
    31,507.67x = 43,481.56 × 18,081.38
  4. Step 4: Simplify right side
    31,507.67x = 786,206,391.95
  5. Step 5: Solve for x
    x = 786,206,391.95/31,507.67
  6. Step 6: Final answer
    x = 24,952.86

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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.