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Finding the Third Proportional to 21,391 and 51,534

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Solution

The third proportional to 21,391 and 51,534 is: 124,152.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391 : 51,534 = 51,534 : x
  2. Step 2: Convert to fraction form
    21,391/51,534 = 51,534/x
  3. Step 3: Cross multiply
    21,391x = 51,534 × 51,534
  4. Step 4: Simplify right side
    21,391x = 2,655,753,156
  5. Step 5: Solve for x
    x = 2,655,753,156/21,391
  6. Step 6: Final answer
    x = 124,152.83

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.