Home / 3,936.72-5,879.58-3,115.92

Finding the Fourth Proportional to 3,936.72, 5,879.58 and 3,115.92

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Solution

The fourth proportional to 3,936.72, 5,879.58 and 3,115.92 is: 4,653.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,936.72 : 5,879.58 = 3,115.92 : x
  2. Step 2: Convert to fraction form
    3,936.72/5,879.58 = 3,115.92/x
  3. Step 3: Cross multiply
    3,936.72x = 5,879.58 × 3,115.92
  4. Step 4: Simplify right side
    3,936.72x = 18,320,300.91
  5. Step 5: Solve for x
    x = 18,320,300.91/3,936.72
  6. Step 6: Final answer
    x = 4,653.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.