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Finding the Third Proportional to 8,726 and 18,487

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Solution

The third proportional to 8,726 and 18,487 is: 39,166.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,726 : 18,487 = 18,487 : x
  2. Step 2: Convert to fraction form
    8,726/18,487 = 18,487/x
  3. Step 3: Cross multiply
    8,726x = 18,487 × 18,487
  4. Step 4: Simplify right side
    8,726x = 341,769,169
  5. Step 5: Solve for x
    x = 341,769,169/8,726
  6. Step 6: Final answer
    x = 39,166.76

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.