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Finding the Third Proportional to 13,938 and 20,461

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Solution

The third proportional to 13,938 and 20,461 is: 30,036.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938 : 20,461 = 20,461 : x
  2. Step 2: Convert to fraction form
    13,938/20,461 = 20,461/x
  3. Step 3: Cross multiply
    13,938x = 20,461 × 20,461
  4. Step 4: Simplify right side
    13,938x = 418,652,521
  5. Step 5: Solve for x
    x = 418,652,521/13,938
  6. Step 6: Final answer
    x = 30,036.77

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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.