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Finding the Third Proportional to 11,385 and 15,213

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Solution

The third proportional to 11,385 and 15,213 is: 20,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385 : 15,213 = 15,213 : x
  2. Step 2: Convert to fraction form
    11,385/15,213 = 15,213/x
  3. Step 3: Cross multiply
    11,385x = 15,213 × 15,213
  4. Step 4: Simplify right side
    11,385x = 231,435,369
  5. Step 5: Solve for x
    x = 231,435,369/11,385
  6. Step 6: Final answer
    x = 20,328.10

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.