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Finding the Fourth Proportional to 6,679.82, 9,218.10 and 3,992.26

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Solution

The fourth proportional to 6,679.82, 9,218.10 and 3,992.26 is: 5,509.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,679.82 : 9,218.10 = 3,992.26 : x
  2. Step 2: Convert to fraction form
    6,679.82/9,218.10 = 3,992.26/x
  3. Step 3: Cross multiply
    6,679.82x = 9,218.10 × 3,992.26
  4. Step 4: Simplify right side
    6,679.82x = 36,801,051.91
  5. Step 5: Solve for x
    x = 36,801,051.91/6,679.82
  6. Step 6: Final answer
    x = 5,509.29

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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.