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Finding the Third Proportional to 12,456 and 18,315

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Solution

The third proportional to 12,456 and 18,315 is: 26,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456 : 18,315 = 18,315 : x
  2. Step 2: Convert to fraction form
    12,456/18,315 = 18,315/x
  3. Step 3: Cross multiply
    12,456x = 18,315 × 18,315
  4. Step 4: Simplify right side
    12,456x = 335,439,225
  5. Step 5: Solve for x
    x = 335,439,225/12,456
  6. Step 6: Final answer
    x = 26,929.93

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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.