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Finding the Third Proportional to 28,816 and 38,720

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Solution

The third proportional to 28,816 and 38,720 is: 52,027.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,816 : 38,720 = 38,720 : x
  2. Step 2: Convert to fraction form
    28,816/38,720 = 38,720/x
  3. Step 3: Cross multiply
    28,816x = 38,720 × 38,720
  4. Step 4: Simplify right side
    28,816x = 1,499,238,400
  5. Step 5: Solve for x
    x = 1,499,238,400/28,816
  6. Step 6: Final answer
    x = 52,027.98

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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.