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Finding the Fourth Proportional to 11,115.80, 16,641.30 and 10,791.80

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Solution

The fourth proportional to 11,115.80, 16,641.30 and 10,791.80 is: 16,156.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.80 : 16,641.30 = 10,791.80 : x
  2. Step 2: Convert to fraction form
    11,115.80/16,641.30 = 10,791.80/x
  3. Step 3: Cross multiply
    11,115.80x = 16,641.30 × 10,791.80
  4. Step 4: Simplify right side
    11,115.80x = 179,589,581.34
  5. Step 5: Solve for x
    x = 179,589,581.34/11,115.80
  6. Step 6: Final answer
    x = 16,156.24

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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.