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Finding the Third Proportional to 12,288.50 and 18,445

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Solution

The third proportional to 12,288.50 and 18,445 is: 27,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.50 : 18,445 = 18,445 : x
  2. Step 2: Convert to fraction form
    12,288.50/18,445 = 18,445/x
  3. Step 3: Cross multiply
    12,288.50x = 18,445 × 18,445
  4. Step 4: Simplify right side
    12,288.50x = 340,218,025
  5. Step 5: Solve for x
    x = 340,218,025/12,288.50
  6. Step 6: Final answer
    x = 27,685.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.