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Finding the Third Proportional to 12,645 and 18,215.50

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Solution

The third proportional to 12,645 and 18,215.50 is: 26,239.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645 : 18,215.50 = 18,215.50 : x
  2. Step 2: Convert to fraction form
    12,645/18,215.50 = 18,215.50/x
  3. Step 3: Cross multiply
    12,645x = 18,215.50 × 18,215.50
  4. Step 4: Simplify right side
    12,645x = 331,804,440.25
  5. Step 5: Solve for x
    x = 331,804,440.25/12,645
  6. Step 6: Final answer
    x = 26,239.97

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.