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Finding the Fourth Proportional to 8,406.10, 12,609.15 and 5,453.65

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Solution

The fourth proportional to 8,406.10, 12,609.15 and 5,453.65 is: 8,180.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,406.10 : 12,609.15 = 5,453.65 : x
  2. Step 2: Convert to fraction form
    8,406.10/12,609.15 = 5,453.65/x
  3. Step 3: Cross multiply
    8,406.10x = 12,609.15 × 5,453.65
  4. Step 4: Simplify right side
    8,406.10x = 68,765,890.90
  5. Step 5: Solve for x
    x = 68,765,890.90/8,406.10
  6. Step 6: Final answer
    x = 8,180.48

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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.