Home / 20,839.96-28,758.85-11,887.61

Finding the Fourth Proportional to 20,839.96, 28,758.85 and 11,887.61

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Solution

The fourth proportional to 20,839.96, 28,758.85 and 11,887.61 is: 16,404.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.96 : 28,758.85 = 11,887.61 : x
  2. Step 2: Convert to fraction form
    20,839.96/28,758.85 = 11,887.61/x
  3. Step 3: Cross multiply
    20,839.96x = 28,758.85 × 11,887.61
  4. Step 4: Simplify right side
    20,839.96x = 341,873,819.34
  5. Step 5: Solve for x
    x = 341,873,819.34/20,839.96
  6. Step 6: Final answer
    x = 16,404.72

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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.