Home / 3,928.29-5,418.21-2,667.15

Finding the Fourth Proportional to 3,928.29, 5,418.21 and 2,667.15

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Solution

The fourth proportional to 3,928.29, 5,418.21 and 2,667.15 is: 3,678.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.29 : 5,418.21 = 2,667.15 : x
  2. Step 2: Convert to fraction form
    3,928.29/5,418.21 = 2,667.15/x
  3. Step 3: Cross multiply
    3,928.29x = 5,418.21 × 2,667.15
  4. Step 4: Simplify right side
    3,928.29x = 14,451,183.01
  5. Step 5: Solve for x
    x = 14,451,183.01/3,928.29
  6. Step 6: Final answer
    x = 3,678.75

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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.