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Finding the Third Proportional to 21,768 and 34,515

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Solution

The third proportional to 21,768 and 34,515 is: 54,726.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,768 : 34,515 = 34,515 : x
  2. Step 2: Convert to fraction form
    21,768/34,515 = 34,515/x
  3. Step 3: Cross multiply
    21,768x = 34,515 × 34,515
  4. Step 4: Simplify right side
    21,768x = 1,191,285,225
  5. Step 5: Solve for x
    x = 1,191,285,225/21,768
  6. Step 6: Final answer
    x = 54,726.44

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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.