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Finding the Fourth Proportional to 10,917.29, 15,079.79 and 8,089.85

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Solution

The fourth proportional to 10,917.29, 15,079.79 and 8,089.85 is: 11,174.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,917.29 : 15,079.79 = 8,089.85 : x
  2. Step 2: Convert to fraction form
    10,917.29/15,079.79 = 8,089.85/x
  3. Step 3: Cross multiply
    10,917.29x = 15,079.79 × 8,089.85
  4. Step 4: Simplify right side
    10,917.29x = 121,993,198.68
  5. Step 5: Solve for x
    x = 121,993,198.68/10,917.29
  6. Step 6: Final answer
    x = 11,174.31

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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.