Home / 3,939.30-5,436.34-2,171.02

Finding the Fourth Proportional to 3,939.30, 5,436.34 and 2,171.02

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Solution

The fourth proportional to 3,939.30, 5,436.34 and 2,171.02 is: 2,996.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.30 : 5,436.34 = 2,171.02 : x
  2. Step 2: Convert to fraction form
    3,939.30/5,436.34 = 2,171.02/x
  3. Step 3: Cross multiply
    3,939.30x = 5,436.34 × 2,171.02
  4. Step 4: Simplify right side
    3,939.30x = 11,802,375.69
  5. Step 5: Solve for x
    x = 11,802,375.69/3,939.30
  6. Step 6: Final answer
    x = 2,996.06

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1.5x scale

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.