Home / 5,138.92-7,091.75-2,781.10

Finding the Fourth Proportional to 5,138.92, 7,091.75 and 2,781.10

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Solution

The fourth proportional to 5,138.92, 7,091.75 and 2,781.10 is: 3,837.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.92 : 7,091.75 = 2,781.10 : x
  2. Step 2: Convert to fraction form
    5,138.92/7,091.75 = 2,781.10/x
  3. Step 3: Cross multiply
    5,138.92x = 7,091.75 × 2,781.10
  4. Step 4: Simplify right side
    5,138.92x = 19,722,855.15
  5. Step 5: Solve for x
    x = 19,722,855.15/5,138.92
  6. Step 6: Final answer
    x = 3,837.94

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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.