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Finding the Fourth Proportional to 7,911.66, 11,867.49 and 2,982.41

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Solution

The fourth proportional to 7,911.66, 11,867.49 and 2,982.41 is: 4,473.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.66 : 11,867.49 = 2,982.41 : x
  2. Step 2: Convert to fraction form
    7,911.66/11,867.49 = 2,982.41/x
  3. Step 3: Cross multiply
    7,911.66x = 11,867.49 × 2,982.41
  4. Step 4: Simplify right side
    7,911.66x = 35,393,720.85
  5. Step 5: Solve for x
    x = 35,393,720.85/7,911.66
  6. Step 6: Final answer
    x = 4,473.62

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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.