Home / 10,147.75-15,221.66-3,991.75

Finding the Fourth Proportional to 10,147.75, 15,221.66 and 3,991.75

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Solution

The fourth proportional to 10,147.75, 15,221.66 and 3,991.75 is: 5,987.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,147.75 : 15,221.66 = 3,991.75 : x
  2. Step 2: Convert to fraction form
    10,147.75/15,221.66 = 3,991.75/x
  3. Step 3: Cross multiply
    10,147.75x = 15,221.66 × 3,991.75
  4. Step 4: Simplify right side
    10,147.75x = 60,761,061.31
  5. Step 5: Solve for x
    x = 60,761,061.31/10,147.75
  6. Step 6: Final answer
    x = 5,987.64

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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.