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Finding the Third Proportional to 12,390 and 27,543

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Solution

The third proportional to 12,390 and 27,543 is: 61,228.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390 : 27,543 = 27,543 : x
  2. Step 2: Convert to fraction form
    12,390/27,543 = 27,543/x
  3. Step 3: Cross multiply
    12,390x = 27,543 × 27,543
  4. Step 4: Simplify right side
    12,390x = 758,616,849
  5. Step 5: Solve for x
    x = 758,616,849/12,390
  6. Step 6: Final answer
    x = 61,228.16

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.