Home / 3,965.12-5,471.82-2,172.61

Finding the Fourth Proportional to 3,965.12, 5,471.82 and 2,172.61

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Solution

The fourth proportional to 3,965.12, 5,471.82 and 2,172.61 is: 2,998.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.12 : 5,471.82 = 2,172.61 : x
  2. Step 2: Convert to fraction form
    3,965.12/5,471.82 = 2,172.61/x
  3. Step 3: Cross multiply
    3,965.12x = 5,471.82 × 2,172.61
  4. Step 4: Simplify right side
    3,965.12x = 11,888,130.85
  5. Step 5: Solve for x
    x = 11,888,130.85/3,965.12
  6. Step 6: Final answer
    x = 2,998.18

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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.