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Finding the Fourth Proportional to 11,928, 17,892 and 3,720

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Solution

The fourth proportional to 11,928, 17,892 and 3,720 is: 5,580

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,928 : 17,892 = 3,720 : x
  2. Step 2: Convert to fraction form
    11,928/17,892 = 3,720/x
  3. Step 3: Cross multiply
    11,928x = 17,892 × 3,720
  4. Step 4: Simplify right side
    11,928x = 66,558,240
  5. Step 5: Solve for x
    x = 66,558,240/11,928
  6. Step 6: Final answer
    x = 5,580

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.