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Finding the Third Proportional to 12,787 and 20,354

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Solution

The third proportional to 12,787 and 20,354 is: 32,398.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,787 : 20,354 = 20,354 : x
  2. Step 2: Convert to fraction form
    12,787/20,354 = 20,354/x
  3. Step 3: Cross multiply
    12,787x = 20,354 × 20,354
  4. Step 4: Simplify right side
    12,787x = 414,285,316
  5. Step 5: Solve for x
    x = 414,285,316/12,787
  6. Step 6: Final answer
    x = 32,398.95

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.