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Finding the Fourth Proportional to 6,416.75, 8,855.12 and 3,472.75

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Solution

The fourth proportional to 6,416.75, 8,855.12 and 3,472.75 is: 4,792.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,416.75 : 8,855.12 = 3,472.75 : x
  2. Step 2: Convert to fraction form
    6,416.75/8,855.12 = 3,472.75/x
  3. Step 3: Cross multiply
    6,416.75x = 8,855.12 × 3,472.75
  4. Step 4: Simplify right side
    6,416.75x = 30,751,600.62
  5. Step 5: Solve for x
    x = 30,751,600.62/6,416.75
  6. Step 6: Final answer
    x = 4,792.40

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Find fourth proportional to 3,208.38, 4,427.56 and 1,736.38
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.