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Finding the Fourth Proportional to 18,793.31, 28,155.17 and 9,422.39

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Solution

The fourth proportional to 18,793.31, 28,155.17 and 9,422.39 is: 14,116.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.31 : 28,155.17 = 9,422.39 : x
  2. Step 2: Convert to fraction form
    18,793.31/28,155.17 = 9,422.39/x
  3. Step 3: Cross multiply
    18,793.31x = 28,155.17 × 9,422.39
  4. Step 4: Simplify right side
    18,793.31x = 265,288,945.14
  5. Step 5: Solve for x
    x = 265,288,945.14/18,793.31
  6. Step 6: Final answer
    x = 14,116.14

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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.