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Finding the Fourth Proportional to 8,611.88, 11,879.64 and 5,074.64

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Solution

The fourth proportional to 8,611.88, 11,879.64 and 5,074.64 is: 7,000.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.88 : 11,879.64 = 5,074.64 : x
  2. Step 2: Convert to fraction form
    8,611.88/11,879.64 = 5,074.64/x
  3. Step 3: Cross multiply
    8,611.88x = 11,879.64 × 5,074.64
  4. Step 4: Simplify right side
    8,611.88x = 60,284,896.33
  5. Step 5: Solve for x
    x = 60,284,896.33/8,611.88
  6. Step 6: Final answer
    x = 7,000.20

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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.