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Finding the Fourth Proportional to 31,695.56, 47,540.84 and 8,321.38

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Solution

The fourth proportional to 31,695.56, 47,540.84 and 8,321.38 is: 12,481.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,695.56 : 47,540.84 = 8,321.38 : x
  2. Step 2: Convert to fraction form
    31,695.56/47,540.84 = 8,321.38/x
  3. Step 3: Cross multiply
    31,695.56x = 47,540.84 × 8,321.38
  4. Step 4: Simplify right side
    31,695.56x = 395,605,395.16
  5. Step 5: Solve for x
    x = 395,605,395.16/31,695.56
  6. Step 6: Final answer
    x = 12,481.41

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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.