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Finding the Fourth Proportional to 6,379.68, 9,571.62 and 2,220.72

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Solution

The fourth proportional to 6,379.68, 9,571.62 and 2,220.72 is: 3,331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,379.68 : 9,571.62 = 2,220.72 : x
  2. Step 2: Convert to fraction form
    6,379.68/9,571.62 = 2,220.72/x
  3. Step 3: Cross multiply
    6,379.68x = 9,571.62 × 2,220.72
  4. Step 4: Simplify right side
    6,379.68x = 21,255,887.97
  5. Step 5: Solve for x
    x = 21,255,887.97/6,379.68
  6. Step 6: Final answer
    x = 3,331.81

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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.