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Finding the Fourth Proportional to 6,645.96, 9,169.78 and 3,992.84

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Solution

The fourth proportional to 6,645.96, 9,169.78 and 3,992.84 is: 5,509.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.96 : 9,169.78 = 3,992.84 : x
  2. Step 2: Convert to fraction form
    6,645.96/9,169.78 = 3,992.84/x
  3. Step 3: Cross multiply
    6,645.96x = 9,169.78 × 3,992.84
  4. Step 4: Simplify right side
    6,645.96x = 36,613,464.38
  5. Step 5: Solve for x
    x = 36,613,464.38/6,645.96
  6. Step 6: Final answer
    x = 5,509.13

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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.