Home / 3,956.15-5,456.85-3,115.46

Finding the Fourth Proportional to 3,956.15, 5,456.85 and 3,115.46

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Solution

The fourth proportional to 3,956.15, 5,456.85 and 3,115.46 is: 4,297.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,956.15 : 5,456.85 = 3,115.46 : x
  2. Step 2: Convert to fraction form
    3,956.15/5,456.85 = 3,115.46/x
  3. Step 3: Cross multiply
    3,956.15x = 5,456.85 × 3,115.46
  4. Step 4: Simplify right side
    3,956.15x = 17,000,597.90
  5. Step 5: Solve for x
    x = 17,000,597.90/3,956.15
  6. Step 6: Final answer
    x = 4,297.26

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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.