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Finding the Fourth Proportional to 12,774.79, 19,163.14 and 3,414.60

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Solution

The fourth proportional to 12,774.79, 19,163.14 and 3,414.60 is: 5,122.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,774.79 : 19,163.14 = 3,414.60 : x
  2. Step 2: Convert to fraction form
    12,774.79/19,163.14 = 3,414.60/x
  3. Step 3: Cross multiply
    12,774.79x = 19,163.14 × 3,414.60
  4. Step 4: Simplify right side
    12,774.79x = 65,434,419.42
  5. Step 5: Solve for x
    x = 65,434,419.42/12,774.79
  6. Step 6: Final answer
    x = 5,122.15

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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.