Home / 5,115.18-7,671.15-2,517.78

Finding the Fourth Proportional to 5,115.18, 7,671.15 and 2,517.78

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Solution

The fourth proportional to 5,115.18, 7,671.15 and 2,517.78 is: 3,775.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.18 : 7,671.15 = 2,517.78 : x
  2. Step 2: Convert to fraction form
    5,115.18/7,671.15 = 2,517.78/x
  3. Step 3: Cross multiply
    5,115.18x = 7,671.15 × 2,517.78
  4. Step 4: Simplify right side
    5,115.18x = 19,314,268.05
  5. Step 5: Solve for x
    x = 19,314,268.05/5,115.18
  6. Step 6: Final answer
    x = 3,775.87

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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.