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Finding the Fourth Proportional to 18,639.92, 27,939.67 and 9,286.92

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Solution

The fourth proportional to 18,639.92, 27,939.67 and 9,286.92 is: 13,920.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.92 : 27,939.67 = 9,286.92 : x
  2. Step 2: Convert to fraction form
    18,639.92/27,939.67 = 9,286.92/x
  3. Step 3: Cross multiply
    18,639.92x = 27,939.67 × 9,286.92
  4. Step 4: Simplify right side
    18,639.92x = 259,473,456.90
  5. Step 5: Solve for x
    x = 259,473,456.90/18,639.92
  6. Step 6: Final answer
    x = 13,920.31

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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.