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Finding the Third Proportional to 8,190 and 12,271

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Solution

The third proportional to 8,190 and 12,271 is: 18,385.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190 : 12,271 = 12,271 : x
  2. Step 2: Convert to fraction form
    8,190/12,271 = 12,271/x
  3. Step 3: Cross multiply
    8,190x = 12,271 × 12,271
  4. Step 4: Simplify right side
    8,190x = 150,577,441
  5. Step 5: Solve for x
    x = 150,577,441/8,190
  6. Step 6: Final answer
    x = 18,385.52

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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.