Home / 3,408.12-5,112.12-2,759.28

Finding the Fourth Proportional to 3,408.12, 5,112.12 and 2,759.28

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Solution

The fourth proportional to 3,408.12, 5,112.12 and 2,759.28 is: 4,138.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,408.12 : 5,112.12 = 2,759.28 : x
  2. Step 2: Convert to fraction form
    3,408.12/5,112.12 = 2,759.28/x
  3. Step 3: Cross multiply
    3,408.12x = 5,112.12 × 2,759.28
  4. Step 4: Simplify right side
    3,408.12x = 14,105,770.47
  5. Step 5: Solve for x
    x = 14,105,770.47/3,408.12
  6. Step 6: Final answer
    x = 4,138.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.