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Finding the Third Proportional to 18,247 and 39,409

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Solution

The third proportional to 18,247 and 39,409 is: 85,113.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,247 : 39,409 = 39,409 : x
  2. Step 2: Convert to fraction form
    18,247/39,409 = 39,409/x
  3. Step 3: Cross multiply
    18,247x = 39,409 × 39,409
  4. Step 4: Simplify right side
    18,247x = 1,553,069,281
  5. Step 5: Solve for x
    x = 1,553,069,281/18,247
  6. Step 6: Final answer
    x = 85,113.68

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.