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Finding the Third Proportional to 21,039 and 28,533

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Solution

The third proportional to 21,039 and 28,533 is: 38,696.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039 : 28,533 = 28,533 : x
  2. Step 2: Convert to fraction form
    21,039/28,533 = 28,533/x
  3. Step 3: Cross multiply
    21,039x = 28,533 × 28,533
  4. Step 4: Simplify right side
    21,039x = 814,132,089
  5. Step 5: Solve for x
    x = 814,132,089/21,039
  6. Step 6: Final answer
    x = 38,696.33

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.