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Finding the Fourth Proportional to 18,564.68, 27,819.68 and 13,611.16

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Solution

The fourth proportional to 18,564.68, 27,819.68 and 13,611.16 is: 20,396.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,564.68 : 27,819.68 = 13,611.16 : x
  2. Step 2: Convert to fraction form
    18,564.68/27,819.68 = 13,611.16/x
  3. Step 3: Cross multiply
    18,564.68x = 27,819.68 × 13,611.16
  4. Step 4: Simplify right side
    18,564.68x = 378,658,115.63
  5. Step 5: Solve for x
    x = 378,658,115.63/18,564.68
  6. Step 6: Final answer
    x = 20,396.69

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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.