Home / 3,939.50-5,436.38-2,171

Finding the Fourth Proportional to 3,939.50, 5,436.38 and 2,171

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Solution

The fourth proportional to 3,939.50, 5,436.38 and 2,171 is: 2,995.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.50 : 5,436.38 = 2,171 : x
  2. Step 2: Convert to fraction form
    3,939.50/5,436.38 = 2,171/x
  3. Step 3: Cross multiply
    3,939.50x = 5,436.38 × 2,171
  4. Step 4: Simplify right side
    3,939.50x = 11,802,380.98
  5. Step 5: Solve for x
    x = 11,802,380.98/3,939.50
  6. Step 6: Final answer
    x = 2,995.91

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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.