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Finding the Fourth Proportional to 31,472.60, 47,165.70 and 25,640.60

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Solution

The fourth proportional to 31,472.60, 47,165.70 and 25,640.60 is: 38,425.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,472.60 : 47,165.70 = 25,640.60 : x
  2. Step 2: Convert to fraction form
    31,472.60/47,165.70 = 25,640.60/x
  3. Step 3: Cross multiply
    31,472.60x = 47,165.70 × 25,640.60
  4. Step 4: Simplify right side
    31,472.60x = 1,209,356,847.42
  5. Step 5: Solve for x
    x = 1,209,356,847.42/31,472.60
  6. Step 6: Final answer
    x = 38,425.71

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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.