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Finding the Fourth Proportional to 11,940.92, 17,911.54 and 4,149.88

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Solution

The fourth proportional to 11,940.92, 17,911.54 and 4,149.88 is: 6,224.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,940.92 : 17,911.54 = 4,149.88 : x
  2. Step 2: Convert to fraction form
    11,940.92/17,911.54 = 4,149.88/x
  3. Step 3: Cross multiply
    11,940.92x = 17,911.54 × 4,149.88
  4. Step 4: Simplify right side
    11,940.92x = 74,330,741.62
  5. Step 5: Solve for x
    x = 74,330,741.62/11,940.92
  6. Step 6: Final answer
    x = 6,224.88

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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.