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Finding the Fourth Proportional to 6,650.76, 9,178.17 and 3,997.65

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Solution

The fourth proportional to 6,650.76, 9,178.17 and 3,997.65 is: 5,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,650.76 : 9,178.17 = 3,997.65 : x
  2. Step 2: Convert to fraction form
    6,650.76/9,178.17 = 3,997.65/x
  3. Step 3: Cross multiply
    6,650.76x = 9,178.17 × 3,997.65
  4. Step 4: Simplify right side
    6,650.76x = 36,691,111.30
  5. Step 5: Solve for x
    x = 36,691,111.30/6,650.76
  6. Step 6: Final answer
    x = 5,516.83

Related Problems

Find fourth proportional to 3,325.38, 4,589.09 and 1,998.83
Half scale
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Double scale
Find fourth proportional to 6,651.76, 9,179.55 and 3,998.65
Similar ratio
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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.