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Finding the Fourth Proportional to 11,910.90, 17,866 and 3,145.89

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Solution

The fourth proportional to 11,910.90, 17,866 and 3,145.89 is: 4,718.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,910.90 : 17,866 = 3,145.89 : x
  2. Step 2: Convert to fraction form
    11,910.90/17,866 = 3,145.89/x
  3. Step 3: Cross multiply
    11,910.90x = 17,866 × 3,145.89
  4. Step 4: Simplify right side
    11,910.90x = 56,204,470.74
  5. Step 5: Solve for x
    x = 56,204,470.74/11,910.90
  6. Step 6: Final answer
    x = 4,718.74

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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.