Home / 3,990.59-5,508.85-2,928.42

Finding the Fourth Proportional to 3,990.59, 5,508.85 and 2,928.42

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Solution

The fourth proportional to 3,990.59, 5,508.85 and 2,928.42 is: 4,042.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.59 : 5,508.85 = 2,928.42 : x
  2. Step 2: Convert to fraction form
    3,990.59/5,508.85 = 2,928.42/x
  3. Step 3: Cross multiply
    3,990.59x = 5,508.85 × 2,928.42
  4. Step 4: Simplify right side
    3,990.59x = 16,132,197.33
  5. Step 5: Solve for x
    x = 16,132,197.33/3,990.59
  6. Step 6: Final answer
    x = 4,042.56

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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.