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Finding the Third Proportional to 15,345 and 21,736

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Solution

The third proportional to 15,345 and 21,736 is: 30,788.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345 : 21,736 = 21,736 : x
  2. Step 2: Convert to fraction form
    15,345/21,736 = 21,736/x
  3. Step 3: Cross multiply
    15,345x = 21,736 × 21,736
  4. Step 4: Simplify right side
    15,345x = 472,453,696
  5. Step 5: Solve for x
    x = 472,453,696/15,345
  6. Step 6: Final answer
    x = 30,788.77

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.