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Finding the Third Proportional to 12,388 and 18,758

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Solution

The third proportional to 12,388 and 18,758 is: 28,403.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388 : 18,758 = 18,758 : x
  2. Step 2: Convert to fraction form
    12,388/18,758 = 18,758/x
  3. Step 3: Cross multiply
    12,388x = 18,758 × 18,758
  4. Step 4: Simplify right side
    12,388x = 351,862,564
  5. Step 5: Solve for x
    x = 351,862,564/12,388
  6. Step 6: Final answer
    x = 28,403.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.