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Finding the Fourth Proportional to 6,611.75, 9,917.69 and 2,169.35

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Solution

The fourth proportional to 6,611.75, 9,917.69 and 2,169.35 is: 3,254.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.75 : 9,917.69 = 2,169.35 : x
  2. Step 2: Convert to fraction form
    6,611.75/9,917.69 = 2,169.35/x
  3. Step 3: Cross multiply
    6,611.75x = 9,917.69 × 2,169.35
  4. Step 4: Simplify right side
    6,611.75x = 21,514,940.80
  5. Step 5: Solve for x
    x = 21,514,940.80/6,611.75
  6. Step 6: Final answer
    x = 3,254.05

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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.