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Finding the Third Proportional to 12,761 and 18,777

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Solution

The third proportional to 12,761 and 18,777 is: 27,629.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,761 : 18,777 = 18,777 : x
  2. Step 2: Convert to fraction form
    12,761/18,777 = 18,777/x
  3. Step 3: Cross multiply
    12,761x = 18,777 × 18,777
  4. Step 4: Simplify right side
    12,761x = 352,575,729
  5. Step 5: Solve for x
    x = 352,575,729/12,761
  6. Step 6: Final answer
    x = 27,629.16

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.