Home / 3,939.32-5,436.14-2,170.89

Finding the Fourth Proportional to 3,939.32, 5,436.14 and 2,170.89

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Solution

The fourth proportional to 3,939.32, 5,436.14 and 2,170.89 is: 2,995.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.32 : 5,436.14 = 2,170.89 : x
  2. Step 2: Convert to fraction form
    3,939.32/5,436.14 = 2,170.89/x
  3. Step 3: Cross multiply
    3,939.32x = 5,436.14 × 2,170.89
  4. Step 4: Simplify right side
    3,939.32x = 11,801,251.11
  5. Step 5: Solve for x
    x = 11,801,251.11/3,939.32
  6. Step 6: Final answer
    x = 2,995.76

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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.