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Finding the Fourth Proportional to 31,481.87, 43,446.12 and 19,551.78

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Solution

The fourth proportional to 31,481.87, 43,446.12 and 19,551.78 is: 26,982.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,481.87 : 43,446.12 = 19,551.78 : x
  2. Step 2: Convert to fraction form
    31,481.87/43,446.12 = 19,551.78/x
  3. Step 3: Cross multiply
    31,481.87x = 43,446.12 × 19,551.78
  4. Step 4: Simplify right side
    31,481.87x = 849,449,016.75
  5. Step 5: Solve for x
    x = 849,449,016.75/31,481.87
  6. Step 6: Final answer
    x = 26,982.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.