Home / 18,979.20-28,480.32-8,591.04

Finding the Fourth Proportional to 18,979.20, 28,480.32 and 8,591.04

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Solution

The fourth proportional to 18,979.20, 28,480.32 and 8,591.04 is: 12,891.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.20 : 28,480.32 = 8,591.04 : x
  2. Step 2: Convert to fraction form
    18,979.20/28,480.32 = 8,591.04/x
  3. Step 3: Cross multiply
    18,979.20x = 28,480.32 × 8,591.04
  4. Step 4: Simplify right side
    18,979.20x = 244,675,568.33
  5. Step 5: Solve for x
    x = 244,675,568.33/18,979.20
  6. Step 6: Final answer
    x = 12,891.77

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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.