Home / 6,630.75-9,151.20-3,979.62

Finding the Fourth Proportional to 6,630.75, 9,151.20 and 3,979.62

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Solution

The fourth proportional to 6,630.75, 9,151.20 and 3,979.62 is: 5,492.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,630.75 : 9,151.20 = 3,979.62 : x
  2. Step 2: Convert to fraction form
    6,630.75/9,151.20 = 3,979.62/x
  3. Step 3: Cross multiply
    6,630.75x = 9,151.20 × 3,979.62
  4. Step 4: Simplify right side
    6,630.75x = 36,418,298.54
  5. Step 5: Solve for x
    x = 36,418,298.54/6,630.75
  6. Step 6: Final answer
    x = 5,492.33

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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.