Home / 3,936.38-5,427.70-2,939.98

Finding the Fourth Proportional to 3,936.38, 5,427.70 and 2,939.98

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Solution

The fourth proportional to 3,936.38, 5,427.70 and 2,939.98 is: 4,053.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.38 : 5,427.70 = 2,939.98 : x
  2. Step 2: Convert to fraction form
    3,936.38/5,427.70 = 2,939.98/x
  3. Step 3: Cross multiply
    3,936.38x = 5,427.70 × 2,939.98
  4. Step 4: Simplify right side
    3,936.38x = 15,957,319.55
  5. Step 5: Solve for x
    x = 15,957,319.55/3,936.38
  6. Step 6: Final answer
    x = 4,053.80

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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.