Home / 5,138.38-7,718.09-3,385.90

Finding the Fourth Proportional to 5,138.38, 7,718.09 and 3,385.90

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Solution

The fourth proportional to 5,138.38, 7,718.09 and 3,385.90 is: 5,085.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.38 : 7,718.09 = 3,385.90 : x
  2. Step 2: Convert to fraction form
    5,138.38/7,718.09 = 3,385.90/x
  3. Step 3: Cross multiply
    5,138.38x = 7,718.09 × 3,385.90
  4. Step 4: Simplify right side
    5,138.38x = 26,132,670.10
  5. Step 5: Solve for x
    x = 26,132,670.10/5,138.38
  6. Step 6: Final answer
    x = 5,085.78

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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.