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Finding the Fourth Proportional to 6,651.86, 9,986.90 and 4,179.33

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Solution

The fourth proportional to 6,651.86, 9,986.90 and 4,179.33 is: 6,274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,651.86 : 9,986.90 = 4,179.33 : x
  2. Step 2: Convert to fraction form
    6,651.86/9,986.90 = 4,179.33/x
  3. Step 3: Cross multiply
    6,651.86x = 9,986.90 × 4,179.33
  4. Step 4: Simplify right side
    6,651.86x = 41,738,529.88
  5. Step 5: Solve for x
    x = 41,738,529.88/6,651.86
  6. Step 6: Final answer
    x = 6,274.72

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1.5x scale

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.