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Finding the Fourth Proportional to 7,489.88, 11,231.56 and 3,979.12

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Solution

The fourth proportional to 7,489.88, 11,231.56 and 3,979.12 is: 5,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.88 : 11,231.56 = 3,979.12 : x
  2. Step 2: Convert to fraction form
    7,489.88/11,231.56 = 3,979.12/x
  3. Step 3: Cross multiply
    7,489.88x = 11,231.56 × 3,979.12
  4. Step 4: Simplify right side
    7,489.88x = 44,691,725.03
  5. Step 5: Solve for x
    x = 44,691,725.03/7,489.88
  6. Step 6: Final answer
    x = 5,966.95

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1.5x scale

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.