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Finding the Third Proportional to 9,681 and 21,318

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Solution

The third proportional to 9,681 and 21,318 is: 46,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,681 : 21,318 = 21,318 : x
  2. Step 2: Convert to fraction form
    9,681/21,318 = 21,318/x
  3. Step 3: Cross multiply
    9,681x = 21,318 × 21,318
  4. Step 4: Simplify right side
    9,681x = 454,457,124
  5. Step 5: Solve for x
    x = 454,457,124/9,681
  6. Step 6: Final answer
    x = 46,943.20

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.