Home / 13,939.48-20,909.86-4,079.61

Finding the Fourth Proportional to 13,939.48, 20,909.86 and 4,079.61

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Solution

The fourth proportional to 13,939.48, 20,909.86 and 4,079.61 is: 6,119.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.48 : 20,909.86 = 4,079.61 : x
  2. Step 2: Convert to fraction form
    13,939.48/20,909.86 = 4,079.61/x
  3. Step 3: Cross multiply
    13,939.48x = 20,909.86 × 4,079.61
  4. Step 4: Simplify right side
    13,939.48x = 85,304,073.95
  5. Step 5: Solve for x
    x = 85,304,073.95/13,939.48
  6. Step 6: Final answer
    x = 6,119.60

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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.