Home / 20,839.52-28,757.76-11,408

Finding the Fourth Proportional to 20,839.52, 28,757.76 and 11,408

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Solution

The fourth proportional to 20,839.52, 28,757.76 and 11,408 is: 15,742.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.52 : 28,757.76 = 11,408 : x
  2. Step 2: Convert to fraction form
    20,839.52/28,757.76 = 11,408/x
  3. Step 3: Cross multiply
    20,839.52x = 28,757.76 × 11,408
  4. Step 4: Simplify right side
    20,839.52x = 328,068,526.08
  5. Step 5: Solve for x
    x = 328,068,526.08/20,839.52
  6. Step 6: Final answer
    x = 15,742.61

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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.