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Finding the Third Proportional to 8,580 and 12,961

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Solution

The third proportional to 8,580 and 12,961 is: 19,578.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,580 : 12,961 = 12,961 : x
  2. Step 2: Convert to fraction form
    8,580/12,961 = 12,961/x
  3. Step 3: Cross multiply
    8,580x = 12,961 × 12,961
  4. Step 4: Simplify right side
    8,580x = 167,987,521
  5. Step 5: Solve for x
    x = 167,987,521/8,580
  6. Step 6: Final answer
    x = 19,578.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.