Home / 10,917.12-16,375.68-3,987.84

Finding the Fourth Proportional to 10,917.12, 16,375.68 and 3,987.84

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Solution

The fourth proportional to 10,917.12, 16,375.68 and 3,987.84 is: 5,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.12 : 16,375.68 = 3,987.84 : x
  2. Step 2: Convert to fraction form
    10,917.12/16,375.68 = 3,987.84/x
  3. Step 3: Cross multiply
    10,917.12x = 16,375.68 × 3,987.84
  4. Step 4: Simplify right side
    10,917.12x = 65,303,591.73
  5. Step 5: Solve for x
    x = 65,303,591.73/10,917.12
  6. Step 6: Final answer
    x = 5,981.76

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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.