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Finding the Fourth Proportional to 18,447.92, 25,394.12 and 13,963.76

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Solution

The fourth proportional to 18,447.92, 25,394.12 and 13,963.76 is: 19,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,447.92 : 25,394.12 = 13,963.76 : x
  2. Step 2: Convert to fraction form
    18,447.92/25,394.12 = 13,963.76/x
  3. Step 3: Cross multiply
    18,447.92x = 25,394.12 × 13,963.76
  4. Step 4: Simplify right side
    18,447.92x = 354,597,397.09
  5. Step 5: Solve for x
    x = 354,597,397.09/18,447.92
  6. Step 6: Final answer
    x = 19,221.54

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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.