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Finding the Fourth Proportional to 11,916.20, 17,874.16 and 2,910.39

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Solution

The fourth proportional to 11,916.20, 17,874.16 and 2,910.39 is: 4,365.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,916.20 : 17,874.16 = 2,910.39 : x
  2. Step 2: Convert to fraction form
    11,916.20/17,874.16 = 2,910.39/x
  3. Step 3: Cross multiply
    11,916.20x = 17,874.16 × 2,910.39
  4. Step 4: Simplify right side
    11,916.20x = 52,020,713.13
  5. Step 5: Solve for x
    x = 52,020,713.13/11,916.20
  6. Step 6: Final answer
    x = 4,365.55

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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.