Home / 3,949.92-5,450.78-2,181.49

Finding the Fourth Proportional to 3,949.92, 5,450.78 and 2,181.49

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Solution

The fourth proportional to 3,949.92, 5,450.78 and 2,181.49 is: 3,010.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.92 : 5,450.78 = 2,181.49 : x
  2. Step 2: Convert to fraction form
    3,949.92/5,450.78 = 2,181.49/x
  3. Step 3: Cross multiply
    3,949.92x = 5,450.78 × 2,181.49
  4. Step 4: Simplify right side
    3,949.92x = 11,890,822.06
  5. Step 5: Solve for x
    x = 11,890,822.06/3,949.92
  6. Step 6: Final answer
    x = 3,010.40

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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.