Home / 3,949.70-5,450.64-2,181.30

Finding the Fourth Proportional to 3,949.70, 5,450.64 and 2,181.30

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Solution

The fourth proportional to 3,949.70, 5,450.64 and 2,181.30 is: 3,010.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.70 : 5,450.64 = 2,181.30 : x
  2. Step 2: Convert to fraction form
    3,949.70/5,450.64 = 2,181.30/x
  3. Step 3: Cross multiply
    3,949.70x = 5,450.64 × 2,181.30
  4. Step 4: Simplify right side
    3,949.70x = 11,889,510.67
  5. Step 5: Solve for x
    x = 11,889,510.67/3,949.70
  6. Step 6: Final answer
    x = 3,010.23

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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.