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Finding the Fourth Proportional to 7,181.78, 10,775.81 and 2,797.72

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Solution

The fourth proportional to 7,181.78, 10,775.81 and 2,797.72 is: 4,197.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.78 : 10,775.81 = 2,797.72 : x
  2. Step 2: Convert to fraction form
    7,181.78/10,775.81 = 2,797.72/x
  3. Step 3: Cross multiply
    7,181.78x = 10,775.81 × 2,797.72
  4. Step 4: Simplify right side
    7,181.78x = 30,147,679.21
  5. Step 5: Solve for x
    x = 30,147,679.21/7,181.78
  6. Step 6: Final answer
    x = 4,197.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.