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Finding the Third Proportional to 12,942 and 19,899

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Solution

The third proportional to 12,942 and 19,899 is: 30,595.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,942 : 19,899 = 19,899 : x
  2. Step 2: Convert to fraction form
    12,942/19,899 = 19,899/x
  3. Step 3: Cross multiply
    12,942x = 19,899 × 19,899
  4. Step 4: Simplify right side
    12,942x = 395,970,201
  5. Step 5: Solve for x
    x = 395,970,201/12,942
  6. Step 6: Final answer
    x = 30,595.75

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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.