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Finding the Fourth Proportional to 12,906.60, 19,361.92 and 5,511.09

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Solution

The fourth proportional to 12,906.60, 19,361.92 and 5,511.09 is: 8,267.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.60 : 19,361.92 = 5,511.09 : x
  2. Step 2: Convert to fraction form
    12,906.60/19,361.92 = 5,511.09/x
  3. Step 3: Cross multiply
    12,906.60x = 19,361.92 × 5,511.09
  4. Step 4: Simplify right side
    12,906.60x = 106,705,352.86
  5. Step 5: Solve for x
    x = 106,705,352.86/12,906.60
  6. Step 6: Final answer
    x = 8,267.51

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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.