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Finding the Third Proportional to 15,868 and 17,308

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Solution

The third proportional to 15,868 and 17,308 is: 18,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,868 : 17,308 = 17,308 : x
  2. Step 2: Convert to fraction form
    15,868/17,308 = 17,308/x
  3. Step 3: Cross multiply
    15,868x = 17,308 × 17,308
  4. Step 4: Simplify right side
    15,868x = 299,566,864
  5. Step 5: Solve for x
    x = 299,566,864/15,868
  6. Step 6: Final answer
    x = 18,878.68

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.