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Finding the Fourth Proportional to 7,908.60, 11,864.52 and 2,979.48

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Solution

The fourth proportional to 7,908.60, 11,864.52 and 2,979.48 is: 4,469.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.60 : 11,864.52 = 2,979.48 : x
  2. Step 2: Convert to fraction form
    7,908.60/11,864.52 = 2,979.48/x
  3. Step 3: Cross multiply
    7,908.60x = 11,864.52 × 2,979.48
  4. Step 4: Simplify right side
    7,908.60x = 35,350,100.05
  5. Step 5: Solve for x
    x = 35,350,100.05/7,908.60
  6. Step 6: Final answer
    x = 4,469.83

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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.