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Finding the Fourth Proportional to 12,611.78, 18,906.72 and 6,366.59

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Solution

The fourth proportional to 12,611.78, 18,906.72 and 6,366.59 is: 9,544.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.78 : 18,906.72 = 6,366.59 : x
  2. Step 2: Convert to fraction form
    12,611.78/18,906.72 = 6,366.59/x
  3. Step 3: Cross multiply
    12,611.78x = 18,906.72 × 6,366.59
  4. Step 4: Simplify right side
    12,611.78x = 120,371,334.48
  5. Step 5: Solve for x
    x = 120,371,334.48/12,611.78
  6. Step 6: Final answer
    x = 9,544.36

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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.