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Finding the Third Proportional to 9,679 and 21,121

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Solution

The third proportional to 9,679 and 21,121 is: 46,089.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,679 : 21,121 = 21,121 : x
  2. Step 2: Convert to fraction form
    9,679/21,121 = 21,121/x
  3. Step 3: Cross multiply
    9,679x = 21,121 × 21,121
  4. Step 4: Simplify right side
    9,679x = 446,096,641
  5. Step 5: Solve for x
    x = 446,096,641/9,679
  6. Step 6: Final answer
    x = 46,089.13

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.