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Finding the Fourth Proportional to 7,181.44, 9,910.51 and 3,994.99

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Solution

The fourth proportional to 7,181.44, 9,910.51 and 3,994.99 is: 5,513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.44 : 9,910.51 = 3,994.99 : x
  2. Step 2: Convert to fraction form
    7,181.44/9,910.51 = 3,994.99/x
  3. Step 3: Cross multiply
    7,181.44x = 9,910.51 × 3,994.99
  4. Step 4: Simplify right side
    7,181.44x = 39,592,353.58
  5. Step 5: Solve for x
    x = 39,592,353.58/7,181.44
  6. Step 6: Final answer
    x = 5,513.15

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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.