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Finding the Third Proportional to 20,928 and 47,712

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Solution

The third proportional to 20,928 and 47,712 is: 108,774.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928 : 47,712 = 47,712 : x
  2. Step 2: Convert to fraction form
    20,928/47,712 = 47,712/x
  3. Step 3: Cross multiply
    20,928x = 47,712 × 47,712
  4. Step 4: Simplify right side
    20,928x = 2,276,434,944
  5. Step 5: Solve for x
    x = 2,276,434,944/20,928
  6. Step 6: Final answer
    x = 108,774.61

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.