Home / 3,936.20-5,427.44-2,939.79

Finding the Fourth Proportional to 3,936.20, 5,427.44 and 2,939.79

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Solution

The fourth proportional to 3,936.20, 5,427.44 and 2,939.79 is: 4,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.20 : 5,427.44 = 2,939.79 : x
  2. Step 2: Convert to fraction form
    3,936.20/5,427.44 = 2,939.79/x
  3. Step 3: Cross multiply
    3,936.20x = 5,427.44 × 2,939.79
  4. Step 4: Simplify right side
    3,936.20x = 15,955,541.19
  5. Step 5: Solve for x
    x = 15,955,541.19/3,936.20
  6. Step 6: Final answer
    x = 4,053.54

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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.