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Finding the Fourth Proportional to 18,558.75, 25,611.18 and 11,106.75

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Solution

The fourth proportional to 18,558.75, 25,611.18 and 11,106.75 is: 15,327.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,558.75 : 25,611.18 = 11,106.75 : x
  2. Step 2: Convert to fraction form
    18,558.75/25,611.18 = 11,106.75/x
  3. Step 3: Cross multiply
    18,558.75x = 25,611.18 × 11,106.75
  4. Step 4: Simplify right side
    18,558.75x = 284,456,973.47
  5. Step 5: Solve for x
    x = 284,456,973.47/18,558.75
  6. Step 6: Final answer
    x = 15,327.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.