Home / 3,211.82-4,432.86-2,687.66

Finding the Fourth Proportional to 3,211.82, 4,432.86 and 2,687.66

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Solution

The fourth proportional to 3,211.82, 4,432.86 and 2,687.66 is: 3,709.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.82 : 4,432.86 = 2,687.66 : x
  2. Step 2: Convert to fraction form
    3,211.82/4,432.86 = 2,687.66/x
  3. Step 3: Cross multiply
    3,211.82x = 4,432.86 × 2,687.66
  4. Step 4: Simplify right side
    3,211.82x = 11,914,020.51
  5. Step 5: Solve for x
    x = 11,914,020.51/3,211.82
  6. Step 6: Final answer
    x = 3,709.43

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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.