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Finding the Fourth Proportional to 3,979.92, 5,494.56 and 3,093.78

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Solution

The fourth proportional to 3,979.92, 5,494.56 and 3,093.78 is: 4,271.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.92 : 5,494.56 = 3,093.78 : x
  2. Step 2: Convert to fraction form
    3,979.92/5,494.56 = 3,093.78/x
  3. Step 3: Cross multiply
    3,979.92x = 5,494.56 × 3,093.78
  4. Step 4: Simplify right side
    3,979.92x = 16,998,959.84
  5. Step 5: Solve for x
    x = 16,998,959.84/3,979.92
  6. Step 6: Final answer
    x = 4,271.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.