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Finding the Third Proportional to 8,581 and 12,869

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Solution

The third proportional to 8,581 and 12,869 is: 19,299.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581 : 12,869 = 12,869 : x
  2. Step 2: Convert to fraction form
    8,581/12,869 = 12,869/x
  3. Step 3: Cross multiply
    8,581x = 12,869 × 12,869
  4. Step 4: Simplify right side
    8,581x = 165,611,161
  5. Step 5: Solve for x
    x = 165,611,161/8,581
  6. Step 6: Final answer
    x = 19,299.75

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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.