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Finding the Fourth Proportional to 31,912.52, 47,868.10 and 8,538.96

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Solution

The fourth proportional to 31,912.52, 47,868.10 and 8,538.96 is: 12,808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,912.52 : 47,868.10 = 8,538.96 : x
  2. Step 2: Convert to fraction form
    31,912.52/47,868.10 = 8,538.96/x
  3. Step 3: Cross multiply
    31,912.52x = 47,868.10 × 8,538.96
  4. Step 4: Simplify right side
    31,912.52x = 408,743,791.18
  5. Step 5: Solve for x
    x = 408,743,791.18/31,912.52
  6. Step 6: Final answer
    x = 12,808.26

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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.