Home / 8,387.26-12,581.09-2,147.42

Finding the Fourth Proportional to 8,387.26, 12,581.09 and 2,147.42

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Solution

The fourth proportional to 8,387.26, 12,581.09 and 2,147.42 is: 3,221.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.26 : 12,581.09 = 2,147.42 : x
  2. Step 2: Convert to fraction form
    8,387.26/12,581.09 = 2,147.42/x
  3. Step 3: Cross multiply
    8,387.26x = 12,581.09 × 2,147.42
  4. Step 4: Simplify right side
    8,387.26x = 27,016,913.06
  5. Step 5: Solve for x
    x = 27,016,913.06/8,387.26
  6. Step 6: Final answer
    x = 3,221.19

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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.