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Finding the Fourth Proportional to 12,611.51, 18,928.95 and 6,375.92

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Solution

The fourth proportional to 12,611.51, 18,928.95 and 6,375.92 is: 9,569.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.51 : 18,928.95 = 6,375.92 : x
  2. Step 2: Convert to fraction form
    12,611.51/18,928.95 = 6,375.92/x
  3. Step 3: Cross multiply
    12,611.51x = 18,928.95 × 6,375.92
  4. Step 4: Simplify right side
    12,611.51x = 120,689,439.00
  5. Step 5: Solve for x
    x = 120,689,439.00/12,611.51
  6. Step 6: Final answer
    x = 9,569.79

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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.