Home / 8,921.12-13,387.82-3,077.73

Finding the Fourth Proportional to 8,921.12, 13,387.82 and 3,077.73

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Solution

The fourth proportional to 8,921.12, 13,387.82 and 3,077.73 is: 4,618.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.12 : 13,387.82 = 3,077.73 : x
  2. Step 2: Convert to fraction form
    8,921.12/13,387.82 = 3,077.73/x
  3. Step 3: Cross multiply
    8,921.12x = 13,387.82 × 3,077.73
  4. Step 4: Simplify right side
    8,921.12x = 41,204,079.86
  5. Step 5: Solve for x
    x = 41,204,079.86/8,921.12
  6. Step 6: Final answer
    x = 4,618.71

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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.