Home / 3,928.12-5,420.19-2,249.14

Finding the Fourth Proportional to 3,928.12, 5,420.19 and 2,249.14

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Solution

The fourth proportional to 3,928.12, 5,420.19 and 2,249.14 is: 3,103.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.12 : 5,420.19 = 2,249.14 : x
  2. Step 2: Convert to fraction form
    3,928.12/5,420.19 = 2,249.14/x
  3. Step 3: Cross multiply
    3,928.12x = 5,420.19 × 2,249.14
  4. Step 4: Simplify right side
    3,928.12x = 12,190,766.14
  5. Step 5: Solve for x
    x = 12,190,766.14/3,928.12
  6. Step 6: Final answer
    x = 3,103.46

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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.