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Finding the Third Proportional to 15,384 and 21,768

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Solution

The third proportional to 15,384 and 21,768 is: 30,801.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,384 : 21,768 = 21,768 : x
  2. Step 2: Convert to fraction form
    15,384/21,768 = 21,768/x
  3. Step 3: Cross multiply
    15,384x = 21,768 × 21,768
  4. Step 4: Simplify right side
    15,384x = 473,845,824
  5. Step 5: Solve for x
    x = 473,845,824/15,384
  6. Step 6: Final answer
    x = 30,801.21

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.