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Finding the Third Proportional to 15,838 and 21,258

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Solution

The third proportional to 15,838 and 21,258 is: 28,532.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,838 : 21,258 = 21,258 : x
  2. Step 2: Convert to fraction form
    15,838/21,258 = 21,258/x
  3. Step 3: Cross multiply
    15,838x = 21,258 × 21,258
  4. Step 4: Simplify right side
    15,838x = 451,902,564
  5. Step 5: Solve for x
    x = 451,902,564/15,838
  6. Step 6: Final answer
    x = 28,532.80

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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.