Home / 12,220.90-18,331.17-3,455.89

Finding the Fourth Proportional to 12,220.90, 18,331.17 and 3,455.89

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Solution

The fourth proportional to 12,220.90, 18,331.17 and 3,455.89 is: 5,183.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.90 : 18,331.17 = 3,455.89 : x
  2. Step 2: Convert to fraction form
    12,220.90/18,331.17 = 3,455.89/x
  3. Step 3: Cross multiply
    12,220.90x = 18,331.17 × 3,455.89
  4. Step 4: Simplify right side
    12,220.90x = 63,350,507.09
  5. Step 5: Solve for x
    x = 63,350,507.09/12,220.90
  6. Step 6: Final answer
    x = 5,183.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.