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Finding the Fourth Proportional to 6,636.38, 9,936.78 and 3,509.90

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Solution

The fourth proportional to 6,636.38, 9,936.78 and 3,509.90 is: 5,255.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,636.38 : 9,936.78 = 3,509.90 : x
  2. Step 2: Convert to fraction form
    6,636.38/9,936.78 = 3,509.90/x
  3. Step 3: Cross multiply
    6,636.38x = 9,936.78 × 3,509.90
  4. Step 4: Simplify right side
    6,636.38x = 34,877,104.12
  5. Step 5: Solve for x
    x = 34,877,104.12/6,636.38
  6. Step 6: Final answer
    x = 5,255.44

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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.