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Finding the Third Proportional to 8,728 and 13,354

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Solution

The third proportional to 8,728 and 13,354 is: 20,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728 : 13,354 = 13,354 : x
  2. Step 2: Convert to fraction form
    8,728/13,354 = 13,354/x
  3. Step 3: Cross multiply
    8,728x = 13,354 × 13,354
  4. Step 4: Simplify right side
    8,728x = 178,329,316
  5. Step 5: Solve for x
    x = 178,329,316/8,728
  6. Step 6: Final answer
    x = 20,431.86

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.