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Finding the Third Proportional to 25,515 and 39,402

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Solution

The third proportional to 25,515 and 39,402 is: 60,847.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,515 : 39,402 = 39,402 : x
  2. Step 2: Convert to fraction form
    25,515/39,402 = 39,402/x
  3. Step 3: Cross multiply
    25,515x = 39,402 × 39,402
  4. Step 4: Simplify right side
    25,515x = 1,552,517,604
  5. Step 5: Solve for x
    x = 1,552,517,604/25,515
  6. Step 6: Final answer
    x = 60,847.25

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.