Home / 3,939.36-5,436.26-2,170.94

Finding the Fourth Proportional to 3,939.36, 5,436.26 and 2,170.94

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Solution

The fourth proportional to 3,939.36, 5,436.26 and 2,170.94 is: 2,995.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.36 : 5,436.26 = 2,170.94 : x
  2. Step 2: Convert to fraction form
    3,939.36/5,436.26 = 2,170.94/x
  3. Step 3: Cross multiply
    3,939.36x = 5,436.26 × 2,170.94
  4. Step 4: Simplify right side
    3,939.36x = 11,801,794.28
  5. Step 5: Solve for x
    x = 11,801,794.28/3,939.36
  6. Step 6: Final answer
    x = 2,995.87

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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.