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Finding the Third Proportional to 12,908 and 19,851

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Solution

The third proportional to 12,908 and 19,851 is: 30,528.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908 : 19,851 = 19,851 : x
  2. Step 2: Convert to fraction form
    12,908/19,851 = 19,851/x
  3. Step 3: Cross multiply
    12,908x = 19,851 × 19,851
  4. Step 4: Simplify right side
    12,908x = 394,062,201
  5. Step 5: Solve for x
    x = 394,062,201/12,908
  6. Step 6: Final answer
    x = 30,528.53

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.