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Finding the Fourth Proportional to 31,694.88, 47,542.32 and 8,321.28

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Solution

The fourth proportional to 31,694.88, 47,542.32 and 8,321.28 is: 12,481.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,694.88 : 47,542.32 = 8,321.28 : x
  2. Step 2: Convert to fraction form
    31,694.88/47,542.32 = 8,321.28/x
  3. Step 3: Cross multiply
    31,694.88x = 47,542.32 × 8,321.28
  4. Step 4: Simplify right side
    31,694.88x = 395,612,956.57
  5. Step 5: Solve for x
    x = 395,612,956.57/31,694.88
  6. Step 6: Final answer
    x = 12,481.92

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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.