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Finding the Third Proportional to 8,555 and 12,855

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Solution

The third proportional to 8,555 and 12,855 is: 19,316.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555 : 12,855 = 12,855 : x
  2. Step 2: Convert to fraction form
    8,555/12,855 = 12,855/x
  3. Step 3: Cross multiply
    8,555x = 12,855 × 12,855
  4. Step 4: Simplify right side
    8,555x = 165,251,025
  5. Step 5: Solve for x
    x = 165,251,025/8,555
  6. Step 6: Final answer
    x = 19,316.31

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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.