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Finding the Third Proportional to 9,831 and 21,507

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Solution

The third proportional to 9,831 and 21,507 is: 47,050.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,831 : 21,507 = 21,507 : x
  2. Step 2: Convert to fraction form
    9,831/21,507 = 21,507/x
  3. Step 3: Cross multiply
    9,831x = 21,507 × 21,507
  4. Step 4: Simplify right side
    9,831x = 462,551,049
  5. Step 5: Solve for x
    x = 462,551,049/9,831
  6. Step 6: Final answer
    x = 47,050.25

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.