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Finding the Third Proportional to 28,721 and 40,846

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Solution

The third proportional to 28,721 and 40,846 is: 58,089.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721 : 40,846 = 40,846 : x
  2. Step 2: Convert to fraction form
    28,721/40,846 = 40,846/x
  3. Step 3: Cross multiply
    28,721x = 40,846 × 40,846
  4. Step 4: Simplify right side
    28,721x = 1,668,395,716
  5. Step 5: Solve for x
    x = 1,668,395,716/28,721
  6. Step 6: Final answer
    x = 58,089.75

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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.