Home / 3,928.61-5,419.94-2,249.12

Finding the Fourth Proportional to 3,928.61, 5,419.94 and 2,249.12

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Solution

The fourth proportional to 3,928.61, 5,419.94 and 2,249.12 is: 3,102.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.61 : 5,419.94 = 2,249.12 : x
  2. Step 2: Convert to fraction form
    3,928.61/5,419.94 = 2,249.12/x
  3. Step 3: Cross multiply
    3,928.61x = 5,419.94 × 2,249.12
  4. Step 4: Simplify right side
    3,928.61x = 12,190,068.35
  5. Step 5: Solve for x
    x = 12,190,068.35/3,928.61
  6. Step 6: Final answer
    x = 3,102.90

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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.