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Finding the Third Proportional to 8,005 and 12,787

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Solution

The third proportional to 8,005 and 12,787 is: 20,425.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,005 : 12,787 = 12,787 : x
  2. Step 2: Convert to fraction form
    8,005/12,787 = 12,787/x
  3. Step 3: Cross multiply
    8,005x = 12,787 × 12,787
  4. Step 4: Simplify right side
    8,005x = 163,507,369
  5. Step 5: Solve for x
    x = 163,507,369/8,005
  6. Step 6: Final answer
    x = 20,425.66

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.