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Finding the Third Proportional to 15,039 and 21,377

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Solution

The third proportional to 15,039 and 21,377 is: 30,386.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039 : 21,377 = 21,377 : x
  2. Step 2: Convert to fraction form
    15,039/21,377 = 21,377/x
  3. Step 3: Cross multiply
    15,039x = 21,377 × 21,377
  4. Step 4: Simplify right side
    15,039x = 456,976,129
  5. Step 5: Solve for x
    x = 456,976,129/15,039
  6. Step 6: Final answer
    x = 30,386.07

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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.