Home / 8,721.28-13,081.82-2,147.52

Finding the Fourth Proportional to 8,721.28, 13,081.82 and 2,147.52

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Solution

The fourth proportional to 8,721.28, 13,081.82 and 2,147.52 is: 3,221.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.28 : 13,081.82 = 2,147.52 : x
  2. Step 2: Convert to fraction form
    8,721.28/13,081.82 = 2,147.52/x
  3. Step 3: Cross multiply
    8,721.28x = 13,081.82 × 2,147.52
  4. Step 4: Simplify right side
    8,721.28x = 28,093,470.09
  5. Step 5: Solve for x
    x = 28,093,470.09/8,721.28
  6. Step 6: Final answer
    x = 3,221.26

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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.