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Finding the Fourth Proportional to 5,979.44, 8,253 and 3,990.75

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Solution

The fourth proportional to 5,979.44, 8,253 and 3,990.75 is: 5,508.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,979.44 : 8,253 = 3,990.75 : x
  2. Step 2: Convert to fraction form
    5,979.44/8,253 = 3,990.75/x
  3. Step 3: Cross multiply
    5,979.44x = 8,253 × 3,990.75
  4. Step 4: Simplify right side
    5,979.44x = 32,935,659.75
  5. Step 5: Solve for x
    x = 32,935,659.75/5,979.44
  6. Step 6: Final answer
    x = 5,508.16

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Half scale
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Double scale
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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.