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Finding the Third Proportional to 7,431 and 15,865

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Solution

The third proportional to 7,431 and 15,865 is: 33,871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,431 : 15,865 = 15,865 : x
  2. Step 2: Convert to fraction form
    7,431/15,865 = 15,865/x
  3. Step 3: Cross multiply
    7,431x = 15,865 × 15,865
  4. Step 4: Simplify right side
    7,431x = 251,698,225
  5. Step 5: Solve for x
    x = 251,698,225/7,431
  6. Step 6: Final answer
    x = 33,871.38

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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.