Home / 20,839.85-28,759.00-11,408.41

Finding the Fourth Proportional to 20,839.85, 28,759.00 and 11,408.41

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Solution

The fourth proportional to 20,839.85, 28,759.00 and 11,408.41 is: 15,743.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.85 : 28,759.00 = 11,408.41 : x
  2. Step 2: Convert to fraction form
    20,839.85/28,759.00 = 11,408.41/x
  3. Step 3: Cross multiply
    20,839.85x = 28,759.00 × 11,408.41
  4. Step 4: Simplify right side
    20,839.85x = 328,094,540.81
  5. Step 5: Solve for x
    x = 328,094,540.81/20,839.85
  6. Step 6: Final answer
    x = 15,743.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.