Home / 7,166.20-9,889.11-3,979.66

Finding the Fourth Proportional to 7,166.20, 9,889.11 and 3,979.66

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Solution

The fourth proportional to 7,166.20, 9,889.11 and 3,979.66 is: 5,491.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,166.20 : 9,889.11 = 3,979.66 : x
  2. Step 2: Convert to fraction form
    7,166.20/9,889.11 = 3,979.66/x
  3. Step 3: Cross multiply
    7,166.20x = 9,889.11 × 3,979.66
  4. Step 4: Simplify right side
    7,166.20x = 39,355,295.50
  5. Step 5: Solve for x
    x = 39,355,295.50/7,166.20
  6. Step 6: Final answer
    x = 5,491.79

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