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Finding the Fourth Proportional to 10,919.88, 16,379.81 and 2,711.88

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Solution

The fourth proportional to 10,919.88, 16,379.81 and 2,711.88 is: 4,067.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.88 : 16,379.81 = 2,711.88 : x
  2. Step 2: Convert to fraction form
    10,919.88/16,379.81 = 2,711.88/x
  3. Step 3: Cross multiply
    10,919.88x = 16,379.81 × 2,711.88
  4. Step 4: Simplify right side
    10,919.88x = 44,420,079.14
  5. Step 5: Solve for x
    x = 44,420,079.14/10,919.88
  6. Step 6: Final answer
    x = 4,067.82

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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.