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Finding the Fourth Proportional to 31,375.05, 47,063.15 and 11,398.73

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Solution

The fourth proportional to 31,375.05, 47,063.15 and 11,398.73 is: 17,098.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,375.05 : 47,063.15 = 11,398.73 : x
  2. Step 2: Convert to fraction form
    31,375.05/47,063.15 = 11,398.73/x
  3. Step 3: Cross multiply
    31,375.05x = 47,063.15 × 11,398.73
  4. Step 4: Simplify right side
    31,375.05x = 536,460,139.80
  5. Step 5: Solve for x
    x = 536,460,139.80/31,375.05
  6. Step 6: Final answer
    x = 17,098.30

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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.