Home / 3,939.38-5,912.71-1,992.94

Finding the Fourth Proportional to 3,939.38, 5,912.71 and 1,992.94

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Solution

The fourth proportional to 3,939.38, 5,912.71 and 1,992.94 is: 2,991.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.38 : 5,912.71 = 1,992.94 : x
  2. Step 2: Convert to fraction form
    3,939.38/5,912.71 = 1,992.94/x
  3. Step 3: Cross multiply
    3,939.38x = 5,912.71 × 1,992.94
  4. Step 4: Simplify right side
    3,939.38x = 11,783,676.27
  5. Step 5: Solve for x
    x = 11,783,676.27/3,939.38
  6. Step 6: Final answer
    x = 2,991.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.