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Finding the Fourth Proportional to 9,072.70, 13,609.05 and 3,879.10

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Solution

The fourth proportional to 9,072.70, 13,609.05 and 3,879.10 is: 5,818.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,072.70 : 13,609.05 = 3,879.10 : x
  2. Step 2: Convert to fraction form
    9,072.70/13,609.05 = 3,879.10/x
  3. Step 3: Cross multiply
    9,072.70x = 13,609.05 × 3,879.10
  4. Step 4: Simplify right side
    9,072.70x = 52,790,865.86
  5. Step 5: Solve for x
    x = 52,790,865.86/9,072.70
  6. Step 6: Final answer
    x = 5,818.65

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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.