Home / 3,928.15-5,420.28-2,249.29

Finding the Fourth Proportional to 3,928.15, 5,420.28 and 2,249.29

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Solution

The fourth proportional to 3,928.15, 5,420.28 and 2,249.29 is: 3,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.15 : 5,420.28 = 2,249.29 : x
  2. Step 2: Convert to fraction form
    3,928.15/5,420.28 = 2,249.29/x
  3. Step 3: Cross multiply
    3,928.15x = 5,420.28 × 2,249.29
  4. Step 4: Simplify right side
    3,928.15x = 12,191,781.60
  5. Step 5: Solve for x
    x = 12,191,781.60/3,928.15
  6. Step 6: Final answer
    x = 3,103.70

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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.