Home / 3,979.60-5,486.91-2,650.39

Finding the Fourth Proportional to 3,979.60, 5,486.91 and 2,650.39

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Solution

The fourth proportional to 3,979.60, 5,486.91 and 2,650.39 is: 3,654.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.60 : 5,486.91 = 2,650.39 : x
  2. Step 2: Convert to fraction form
    3,979.60/5,486.91 = 2,650.39/x
  3. Step 3: Cross multiply
    3,979.60x = 5,486.91 × 2,650.39
  4. Step 4: Simplify right side
    3,979.60x = 14,542,451.39
  5. Step 5: Solve for x
    x = 14,542,451.39/3,979.60
  6. Step 6: Final answer
    x = 3,654.25

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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.