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Finding the Fourth Proportional to 6,620.73, 9,136.36 and 3,968.38

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Solution

The fourth proportional to 6,620.73, 9,136.36 and 3,968.38 is: 5,476.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,620.73 : 9,136.36 = 3,968.38 : x
  2. Step 2: Convert to fraction form
    6,620.73/9,136.36 = 3,968.38/x
  3. Step 3: Cross multiply
    6,620.73x = 9,136.36 × 3,968.38
  4. Step 4: Simplify right side
    6,620.73x = 36,256,548.30
  5. Step 5: Solve for x
    x = 36,256,548.30/6,620.73
  6. Step 6: Final answer
    x = 5,476.22

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1.5x scale

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.