Home / 3,939.52-5,436.65-2,171.24

Finding the Fourth Proportional to 3,939.52, 5,436.65 and 2,171.24

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Solution

The fourth proportional to 3,939.52, 5,436.65 and 2,171.24 is: 2,996.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.52 : 5,436.65 = 2,171.24 : x
  2. Step 2: Convert to fraction form
    3,939.52/5,436.65 = 2,171.24/x
  3. Step 3: Cross multiply
    3,939.52x = 5,436.65 × 2,171.24
  4. Step 4: Simplify right side
    3,939.52x = 11,804,233.91
  5. Step 5: Solve for x
    x = 11,804,233.91/3,939.52
  6. Step 6: Final answer
    x = 2,996.37

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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.