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Finding the Fourth Proportional to 9,936, 14,904 and 2,640

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Solution

The fourth proportional to 9,936, 14,904 and 2,640 is: 3,960

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,936 : 14,904 = 2,640 : x
  2. Step 2: Convert to fraction form
    9,936/14,904 = 2,640/x
  3. Step 3: Cross multiply
    9,936x = 14,904 × 2,640
  4. Step 4: Simplify right side
    9,936x = 39,346,560
  5. Step 5: Solve for x
    x = 39,346,560/9,936
  6. Step 6: Final answer
    x = 3,960

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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.