Home / 8,231.42-11,283.15-8,120.66

Finding the Fourth Proportional to 8,231.42, 11,283.15 and 8,120.66

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Solution

The fourth proportional to 8,231.42, 11,283.15 and 8,120.66 is: 11,131.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,231.42 : 11,283.15 = 8,120.66 : x
  2. Step 2: Convert to fraction form
    8,231.42/11,283.15 = 8,120.66/x
  3. Step 3: Cross multiply
    8,231.42x = 11,283.15 × 8,120.66
  4. Step 4: Simplify right side
    8,231.42x = 91,626,624.88
  5. Step 5: Solve for x
    x = 91,626,624.88/8,231.42
  6. Step 6: Final answer
    x = 11,131.33

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.