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Finding the Third Proportional to 8,630 and 18,489

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Solution

The third proportional to 8,630 and 18,489 is: 39,611.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,630 : 18,489 = 18,489 : x
  2. Step 2: Convert to fraction form
    8,630/18,489 = 18,489/x
  3. Step 3: Cross multiply
    8,630x = 18,489 × 18,489
  4. Step 4: Simplify right side
    8,630x = 341,843,121
  5. Step 5: Solve for x
    x = 341,843,121/8,630
  6. Step 6: Final answer
    x = 39,611.02

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.