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Finding the Third Proportional to 12,699 and 27,859

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Solution

The third proportional to 12,699 and 27,859 is: 61,116.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699 : 27,859 = 27,859 : x
  2. Step 2: Convert to fraction form
    12,699/27,859 = 27,859/x
  3. Step 3: Cross multiply
    12,699x = 27,859 × 27,859
  4. Step 4: Simplify right side
    12,699x = 776,123,881
  5. Step 5: Solve for x
    x = 776,123,881/12,699
  6. Step 6: Final answer
    x = 61,116.93

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.