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Finding the Third Proportional to 5,918 and 8,402

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Solution

The third proportional to 5,918 and 8,402 is: 11,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918 : 8,402 = 8,402 : x
  2. Step 2: Convert to fraction form
    5,918/8,402 = 8,402/x
  3. Step 3: Cross multiply
    5,918x = 8,402 × 8,402
  4. Step 4: Simplify right side
    5,918x = 70,593,604
  5. Step 5: Solve for x
    x = 70,593,604/5,918
  6. Step 6: Final answer
    x = 11,928.63

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.