Home / 3,939.09-5,435.87-2,170.86

Finding the Fourth Proportional to 3,939.09, 5,435.87 and 2,170.86

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Solution

The fourth proportional to 3,939.09, 5,435.87 and 2,170.86 is: 2,995.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.09 : 5,435.87 = 2,170.86 : x
  2. Step 2: Convert to fraction form
    3,939.09/5,435.87 = 2,170.86/x
  3. Step 3: Cross multiply
    3,939.09x = 5,435.87 × 2,170.86
  4. Step 4: Simplify right side
    3,939.09x = 11,800,512.75
  5. Step 5: Solve for x
    x = 11,800,512.75/3,939.09
  6. Step 6: Final answer
    x = 2,995.75

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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.