Home / 3,705.12-5,115.42-3,311.46

Finding the Fourth Proportional to 3,705.12, 5,115.42 and 3,311.46

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Solution

The fourth proportional to 3,705.12, 5,115.42 and 3,311.46 is: 4,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,705.12 : 5,115.42 = 3,311.46 : x
  2. Step 2: Convert to fraction form
    3,705.12/5,115.42 = 3,311.46/x
  3. Step 3: Cross multiply
    3,705.12x = 5,115.42 × 3,311.46
  4. Step 4: Simplify right side
    3,705.12x = 16,939,508.71
  5. Step 5: Solve for x
    x = 16,939,508.71/3,705.12
  6. Step 6: Final answer
    x = 4,571.92

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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.