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Finding the Third Proportional to 9,768 and 21,720

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Solution

The third proportional to 9,768 and 21,720 is: 48,296.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,768 : 21,720 = 21,720 : x
  2. Step 2: Convert to fraction form
    9,768/21,720 = 21,720/x
  3. Step 3: Cross multiply
    9,768x = 21,720 × 21,720
  4. Step 4: Simplify right side
    9,768x = 471,758,400
  5. Step 5: Solve for x
    x = 471,758,400/9,768
  6. Step 6: Final answer
    x = 48,296.31

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.