Home / 3,939.66-5,436.39-2,170.98

Finding the Fourth Proportional to 3,939.66, 5,436.39 and 2,170.98

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Solution

The fourth proportional to 3,939.66, 5,436.39 and 2,170.98 is: 2,995.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.66 : 5,436.39 = 2,170.98 : x
  2. Step 2: Convert to fraction form
    3,939.66/5,436.39 = 2,170.98/x
  3. Step 3: Cross multiply
    3,939.66x = 5,436.39 × 2,170.98
  4. Step 4: Simplify right side
    3,939.66x = 11,802,293.96
  5. Step 5: Solve for x
    x = 11,802,293.96/3,939.66
  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.