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Finding the Third Proportional to 12,980 and 20,580

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Solution

The third proportional to 12,980 and 20,580 is: 32,629.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980 : 20,580 = 20,580 : x
  2. Step 2: Convert to fraction form
    12,980/20,580 = 20,580/x
  3. Step 3: Cross multiply
    12,980x = 20,580 × 20,580
  4. Step 4: Simplify right side
    12,980x = 423,536,400
  5. Step 5: Solve for x
    x = 423,536,400/12,980
  6. Step 6: Final answer
    x = 32,629.92

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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.