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Finding the Third Proportional to 15,746 and 21,291

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Solution

The third proportional to 15,746 and 21,291 is: 28,788.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,746 : 21,291 = 21,291 : x
  2. Step 2: Convert to fraction form
    15,746/21,291 = 21,291/x
  3. Step 3: Cross multiply
    15,746x = 21,291 × 21,291
  4. Step 4: Simplify right side
    15,746x = 453,306,681
  5. Step 5: Solve for x
    x = 453,306,681/15,746
  6. Step 6: Final answer
    x = 28,788.69

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.