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Finding the Third Proportional to 15,218 and 20,356

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Solution

The third proportional to 15,218 and 20,356 is: 27,228.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218 : 20,356 = 20,356 : x
  2. Step 2: Convert to fraction form
    15,218/20,356 = 20,356/x
  3. Step 3: Cross multiply
    15,218x = 20,356 × 20,356
  4. Step 4: Simplify right side
    15,218x = 414,366,736
  5. Step 5: Solve for x
    x = 414,366,736/15,218
  6. Step 6: Final answer
    x = 27,228.72

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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.