Home / 8,387.28-12,580.78-2,147.24

Finding the Fourth Proportional to 8,387.28, 12,580.78 and 2,147.24

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Solution

The fourth proportional to 8,387.28, 12,580.78 and 2,147.24 is: 3,220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.28 : 12,580.78 = 2,147.24 : x
  2. Step 2: Convert to fraction form
    8,387.28/12,580.78 = 2,147.24/x
  3. Step 3: Cross multiply
    8,387.28x = 12,580.78 × 2,147.24
  4. Step 4: Simplify right side
    8,387.28x = 27,013,954.05
  5. Step 5: Solve for x
    x = 27,013,954.05/8,387.28
  6. Step 6: Final answer
    x = 3,220.82

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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.