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Finding the Fourth Proportional to 7,990.12, 11,986.26 and 7,504.12

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Solution

The fourth proportional to 7,990.12, 11,986.26 and 7,504.12 is: 11,257.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.12 : 11,986.26 = 7,504.12 : x
  2. Step 2: Convert to fraction form
    7,990.12/11,986.26 = 7,504.12/x
  3. Step 3: Cross multiply
    7,990.12x = 11,986.26 × 7,504.12
  4. Step 4: Simplify right side
    7,990.12x = 89,946,333.39
  5. Step 5: Solve for x
    x = 89,946,333.39/7,990.12
  6. Step 6: Final answer
    x = 11,257.19

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.