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Finding the Fourth Proportional to 18,696.87, 28,050.60 and 7,611.53

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Solution

The fourth proportional to 18,696.87, 28,050.60 and 7,611.53 is: 11,419.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.87 : 28,050.60 = 7,611.53 : x
  2. Step 2: Convert to fraction form
    18,696.87/28,050.60 = 7,611.53/x
  3. Step 3: Cross multiply
    18,696.87x = 28,050.60 × 7,611.53
  4. Step 4: Simplify right side
    18,696.87x = 213,507,843.17
  5. Step 5: Solve for x
    x = 213,507,843.17/18,696.87
  6. Step 6: Final answer
    x = 11,419.44

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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.