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Finding the Fourth Proportional to 7,163.90, 9,886.77 and 4,179.92

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Solution

The fourth proportional to 7,163.90, 9,886.77 and 4,179.92 is: 5,768.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.90 : 9,886.77 = 4,179.92 : x
  2. Step 2: Convert to fraction form
    7,163.90/9,886.77 = 4,179.92/x
  3. Step 3: Cross multiply
    7,163.90x = 9,886.77 × 4,179.92
  4. Step 4: Simplify right side
    7,163.90x = 41,325,858.22
  5. Step 5: Solve for x
    x = 41,325,858.22/7,163.90
  6. Step 6: Final answer
    x = 5,768.63

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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.