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Finding the Third Proportional to 4,946 and 7,857

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Solution

The third proportional to 4,946 and 7,857 is: 12,481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,946 : 7,857 = 7,857 : x
  2. Step 2: Convert to fraction form
    4,946/7,857 = 7,857/x
  3. Step 3: Cross multiply
    4,946x = 7,857 × 7,857
  4. Step 4: Simplify right side
    4,946x = 61,732,449
  5. Step 5: Solve for x
    x = 61,732,449/4,946
  6. Step 6: Final answer
    x = 12,481.29

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.