Home / 3,939.27-5,436.20-2,146.76

Finding the Fourth Proportional to 3,939.27, 5,436.20 and 2,146.76

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Solution

The fourth proportional to 3,939.27, 5,436.20 and 2,146.76 is: 2,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.27 : 5,436.20 = 2,146.76 : x
  2. Step 2: Convert to fraction form
    3,939.27/5,436.20 = 2,146.76/x
  3. Step 3: Cross multiply
    3,939.27x = 5,436.20 × 2,146.76
  4. Step 4: Simplify right side
    3,939.27x = 11,670,235.67
  5. Step 5: Solve for x
    x = 11,670,235.67/3,939.27
  6. Step 6: Final answer
    x = 2,962.54

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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.