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Finding the Third Proportional to 12,778 and 19,832

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Solution

The third proportional to 12,778 and 19,832 is: 30,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778 : 19,832 = 19,832 : x
  2. Step 2: Convert to fraction form
    12,778/19,832 = 19,832/x
  3. Step 3: Cross multiply
    12,778x = 19,832 × 19,832
  4. Step 4: Simplify right side
    12,778x = 393,308,224
  5. Step 5: Solve for x
    x = 393,308,224/12,778
  6. Step 6: Final answer
    x = 30,780.11

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.