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Finding the Fourth Proportional to 6,643.92, 9,168.72 and 3,660

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Solution

The fourth proportional to 6,643.92, 9,168.72 and 3,660 is: 5,050.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.92 : 9,168.72 = 3,660 : x
  2. Step 2: Convert to fraction form
    6,643.92/9,168.72 = 3,660/x
  3. Step 3: Cross multiply
    6,643.92x = 9,168.72 × 3,660
  4. Step 4: Simplify right side
    6,643.92x = 33,557,515.20
  5. Step 5: Solve for x
    x = 33,557,515.20/6,643.92
  6. Step 6: Final answer
    x = 5,050.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.