Home / 8,131.40-12,197.10-7,286.60

Finding the Fourth Proportional to 8,131.40, 12,197.10 and 7,286.60

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Solution

The fourth proportional to 8,131.40, 12,197.10 and 7,286.60 is: 10,929.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.40 : 12,197.10 = 7,286.60 : x
  2. Step 2: Convert to fraction form
    8,131.40/12,197.10 = 7,286.60/x
  3. Step 3: Cross multiply
    8,131.40x = 12,197.10 × 7,286.60
  4. Step 4: Simplify right side
    8,131.40x = 88,875,388.86
  5. Step 5: Solve for x
    x = 88,875,388.86/8,131.40
  6. Step 6: Final answer
    x = 10,929.90

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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.