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Finding the Third Proportional to 21,663 and 39,192.75

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Solution

The third proportional to 21,663 and 39,192.75 is: 70,907.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663 : 39,192.75 = 39,192.75 : x
  2. Step 2: Convert to fraction form
    21,663/39,192.75 = 39,192.75/x
  3. Step 3: Cross multiply
    21,663x = 39,192.75 × 39,192.75
  4. Step 4: Simplify right side
    21,663x = 1,536,071,652.56
  5. Step 5: Solve for x
    x = 1,536,071,652.56/21,663
  6. Step 6: Final answer
    x = 70,907.61

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.