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Finding the Third Proportional to 18,928 and 28,656

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Solution

The third proportional to 18,928 and 28,656 is: 43,383.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 28,656 = 28,656 : x
  2. Step 2: Convert to fraction form
    18,928/28,656 = 28,656/x
  3. Step 3: Cross multiply
    18,928x = 28,656 × 28,656
  4. Step 4: Simplify right side
    18,928x = 821,166,336
  5. Step 5: Solve for x
    x = 821,166,336/18,928
  6. Step 6: Final answer
    x = 43,383.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.