Home / 3,899.62-5,380.86-2,220.09

Finding the Fourth Proportional to 3,899.62, 5,380.86 and 2,220.09

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Solution

The fourth proportional to 3,899.62, 5,380.86 and 2,220.09 is: 3,063.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.62 : 5,380.86 = 2,220.09 : x
  2. Step 2: Convert to fraction form
    3,899.62/5,380.86 = 2,220.09/x
  3. Step 3: Cross multiply
    3,899.62x = 5,380.86 × 2,220.09
  4. Step 4: Simplify right side
    3,899.62x = 11,945,993.48
  5. Step 5: Solve for x
    x = 11,945,993.48/3,899.62
  6. Step 6: Final answer
    x = 3,063.37

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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.