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Finding the Third Proportional to 8,980 and 20,972

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Solution

The third proportional to 8,980 and 20,972 is: 48,978.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980 : 20,972 = 20,972 : x
  2. Step 2: Convert to fraction form
    8,980/20,972 = 20,972/x
  3. Step 3: Cross multiply
    8,980x = 20,972 × 20,972
  4. Step 4: Simplify right side
    8,980x = 439,824,784
  5. Step 5: Solve for x
    x = 439,824,784/8,980
  6. Step 6: Final answer
    x = 48,978.26

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.