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Finding the Fourth Proportional to 6,638.64, 9,960 and 2,743.32

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Solution

The fourth proportional to 6,638.64, 9,960 and 2,743.32 is: 4,115.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.64 : 9,960 = 2,743.32 : x
  2. Step 2: Convert to fraction form
    6,638.64/9,960 = 2,743.32/x
  3. Step 3: Cross multiply
    6,638.64x = 9,960 × 2,743.32
  4. Step 4: Simplify right side
    6,638.64x = 27,323,467.20
  5. Step 5: Solve for x
    x = 27,323,467.20/6,638.64
  6. Step 6: Final answer
    x = 4,115.82

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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.