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Finding the Third Proportional to 15,878 and 18,758

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Solution

The third proportional to 15,878 and 18,758 is: 22,160.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878 : 18,758 = 18,758 : x
  2. Step 2: Convert to fraction form
    15,878/18,758 = 18,758/x
  3. Step 3: Cross multiply
    15,878x = 18,758 × 18,758
  4. Step 4: Simplify right side
    15,878x = 351,862,564
  5. Step 5: Solve for x
    x = 351,862,564/15,878
  6. Step 6: Final answer
    x = 22,160.38

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.