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Finding the Third Proportional to 8,455 and 12,938

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Solution

The third proportional to 8,455 and 12,938 is: 19,797.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455 : 12,938 = 12,938 : x
  2. Step 2: Convert to fraction form
    8,455/12,938 = 12,938/x
  3. Step 3: Cross multiply
    8,455x = 12,938 × 12,938
  4. Step 4: Simplify right side
    8,455x = 167,391,844
  5. Step 5: Solve for x
    x = 167,391,844/8,455
  6. Step 6: Final answer
    x = 19,797.97

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.