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Finding the Fourth Proportional to 22,220.50, 30,661.62 and 12,660.43

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Solution

The fourth proportional to 22,220.50, 30,661.62 and 12,660.43 is: 17,469.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,220.50 : 30,661.62 = 12,660.43 : x
  2. Step 2: Convert to fraction form
    22,220.50/30,661.62 = 12,660.43/x
  3. Step 3: Cross multiply
    22,220.50x = 30,661.62 × 12,660.43
  4. Step 4: Simplify right side
    22,220.50x = 388,189,293.70
  5. Step 5: Solve for x
    x = 388,189,293.70/22,220.50
  6. Step 6: Final answer
    x = 17,469.87

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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.