Home / 8,131.20-12,196.80-4,235.10

Finding the Fourth Proportional to 8,131.20, 12,196.80 and 4,235.10

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Solution

The fourth proportional to 8,131.20, 12,196.80 and 4,235.10 is: 6,352.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.20 : 12,196.80 = 4,235.10 : x
  2. Step 2: Convert to fraction form
    8,131.20/12,196.80 = 4,235.10/x
  3. Step 3: Cross multiply
    8,131.20x = 12,196.80 × 4,235.10
  4. Step 4: Simplify right side
    8,131.20x = 51,654,667.68
  5. Step 5: Solve for x
    x = 51,654,667.68/8,131.20
  6. Step 6: Final answer
    x = 6,352.65

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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.