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Finding the Fourth Proportional to 7,181.64, 9,910.58 and 3,994.92

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Solution

The fourth proportional to 7,181.64, 9,910.58 and 3,994.92 is: 5,512.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.64 : 9,910.58 = 3,994.92 : x
  2. Step 2: Convert to fraction form
    7,181.64/9,910.58 = 3,994.92/x
  3. Step 3: Cross multiply
    7,181.64x = 9,910.58 × 3,994.92
  4. Step 4: Simplify right side
    7,181.64x = 39,591,954.28
  5. Step 5: Solve for x
    x = 39,591,954.28/7,181.64
  6. Step 6: Final answer
    x = 5,512.94

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Half scale
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Double scale
Find fourth proportional to 7,182.64, 9,911.95 and 3,995.92
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.