Home / 3,939.32-5,436.36-2,170.88

Finding the Fourth Proportional to 3,939.32, 5,436.36 and 2,170.88

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Solution

The fourth proportional to 3,939.32, 5,436.36 and 2,170.88 is: 2,995.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.32 : 5,436.36 = 2,170.88 : x
  2. Step 2: Convert to fraction form
    3,939.32/5,436.36 = 2,170.88/x
  3. Step 3: Cross multiply
    3,939.32x = 5,436.36 × 2,170.88
  4. Step 4: Simplify right side
    3,939.32x = 11,801,685.20
  5. Step 5: Solve for x
    x = 11,801,685.20/3,939.32
  6. Step 6: Final answer
    x = 2,995.87

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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.