Home / 12,220.39-18,330.26-3,900.91

Finding the Fourth Proportional to 12,220.39, 18,330.26 and 3,900.91

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Solution

The fourth proportional to 12,220.39, 18,330.26 and 3,900.91 is: 5,851.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.39 : 18,330.26 = 3,900.91 : x
  2. Step 2: Convert to fraction form
    12,220.39/18,330.26 = 3,900.91/x
  3. Step 3: Cross multiply
    12,220.39x = 18,330.26 × 3,900.91
  4. Step 4: Simplify right side
    12,220.39x = 71,504,694.54
  5. Step 5: Solve for x
    x = 71,504,694.54/12,220.39
  6. Step 6: Final answer
    x = 5,851.26

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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.