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Finding the Fourth Proportional to 7,319.87, 10,979.80 and 1,773.21

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Solution

The fourth proportional to 7,319.87, 10,979.80 and 1,773.21 is: 2,659.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.87 : 10,979.80 = 1,773.21 : x
  2. Step 2: Convert to fraction form
    7,319.87/10,979.80 = 1,773.21/x
  3. Step 3: Cross multiply
    7,319.87x = 10,979.80 × 1,773.21
  4. Step 4: Simplify right side
    7,319.87x = 19,469,486.72
  5. Step 5: Solve for x
    x = 19,469,486.72/7,319.87
  6. Step 6: Final answer
    x = 2,659.82

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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.