Home / 5,138.43-7,709.27-2,218.11

Finding the Fourth Proportional to 5,138.43, 7,709.27 and 2,218.11

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Solution

The fourth proportional to 5,138.43, 7,709.27 and 2,218.11 is: 3,327.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.43 : 7,709.27 = 2,218.11 : x
  2. Step 2: Convert to fraction form
    5,138.43/7,709.27 = 2,218.11/x
  3. Step 3: Cross multiply
    5,138.43x = 7,709.27 × 2,218.11
  4. Step 4: Simplify right side
    5,138.43x = 17,099,997.79
  5. Step 5: Solve for x
    x = 17,099,997.79/5,138.43
  6. Step 6: Final answer
    x = 3,327.86

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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.