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Finding the Third Proportional to 9,783 and 21,309

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Solution

The third proportional to 9,783 and 21,309 is: 46,414.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,783 : 21,309 = 21,309 : x
  2. Step 2: Convert to fraction form
    9,783/21,309 = 21,309/x
  3. Step 3: Cross multiply
    9,783x = 21,309 × 21,309
  4. Step 4: Simplify right side
    9,783x = 454,073,481
  5. Step 5: Solve for x
    x = 454,073,481/9,783
  6. Step 6: Final answer
    x = 46,414.54

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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.