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Finding the Fourth Proportional to 31,840, 47,777.52 and 15,424

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Solution

The fourth proportional to 31,840, 47,777.52 and 15,424 is: 23,144.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,840 : 47,777.52 = 15,424 : x
  2. Step 2: Convert to fraction form
    31,840/47,777.52 = 15,424/x
  3. Step 3: Cross multiply
    31,840x = 47,777.52 × 15,424
  4. Step 4: Simplify right side
    31,840x = 736,920,468.48
  5. Step 5: Solve for x
    x = 736,920,468.48/31,840
  6. Step 6: Final answer
    x = 23,144.49

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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.