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Finding the Third Proportional to 8,635.50 and 12,220.50

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Solution

The third proportional to 8,635.50 and 12,220.50 is: 17,293.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,635.50 : 12,220.50 = 12,220.50 : x
  2. Step 2: Convert to fraction form
    8,635.50/12,220.50 = 12,220.50/x
  3. Step 3: Cross multiply
    8,635.50x = 12,220.50 × 12,220.50
  4. Step 4: Simplify right side
    8,635.50x = 149,340,620.25
  5. Step 5: Solve for x
    x = 149,340,620.25/8,635.50
  6. Step 6: Final answer
    x = 17,293.80

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.