Home / 3,939.72-5,436.60-2,447.61

Finding the Fourth Proportional to 3,939.72, 5,436.60 and 2,447.61

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Solution

The fourth proportional to 3,939.72, 5,436.60 and 2,447.61 is: 3,377.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.72 : 5,436.60 = 2,447.61 : x
  2. Step 2: Convert to fraction form
    3,939.72/5,436.60 = 2,447.61/x
  3. Step 3: Cross multiply
    3,939.72x = 5,436.60 × 2,447.61
  4. Step 4: Simplify right side
    3,939.72x = 13,306,676.53
  5. Step 5: Solve for x
    x = 13,306,676.53/3,939.72
  6. Step 6: Final answer
    x = 3,377.57

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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.