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Finding the Third Proportional to 15,878 and 33,865

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Solution

The third proportional to 15,878 and 33,865 is: 72,228.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878 : 33,865 = 33,865 : x
  2. Step 2: Convert to fraction form
    15,878/33,865 = 33,865/x
  3. Step 3: Cross multiply
    15,878x = 33,865 × 33,865
  4. Step 4: Simplify right side
    15,878x = 1,146,838,225
  5. Step 5: Solve for x
    x = 1,146,838,225/15,878
  6. Step 6: Final answer
    x = 72,228.13

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.