Home / 3,939.89-5,437.05-2,171.48

Finding the Fourth Proportional to 3,939.89, 5,437.05 and 2,171.48

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Solution

The fourth proportional to 3,939.89, 5,437.05 and 2,171.48 is: 2,996.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.89 : 5,437.05 = 2,171.48 : x
  2. Step 2: Convert to fraction form
    3,939.89/5,437.05 = 2,171.48/x
  3. Step 3: Cross multiply
    3,939.89x = 5,437.05 × 2,171.48
  4. Step 4: Simplify right side
    3,939.89x = 11,806,445.33
  5. Step 5: Solve for x
    x = 11,806,445.33/3,939.89
  6. Step 6: Final answer
    x = 2,996.64

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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.