Home / 3,938.86-5,435.91-2,743.90

Finding the Fourth Proportional to 3,938.86, 5,435.91 and 2,743.90

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Solution

The fourth proportional to 3,938.86, 5,435.91 and 2,743.90 is: 3,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.86 : 5,435.91 = 2,743.90 : x
  2. Step 2: Convert to fraction form
    3,938.86/5,435.91 = 2,743.90/x
  3. Step 3: Cross multiply
    3,938.86x = 5,435.91 × 2,743.90
  4. Step 4: Simplify right side
    3,938.86x = 14,915,593.45
  5. Step 5: Solve for x
    x = 14,915,593.45/3,938.86
  6. Step 6: Final answer
    x = 3,786.78

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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.