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Finding the Fourth Proportional to 18,375.76, 27,570.12 and 6,690.16

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Solution

The fourth proportional to 18,375.76, 27,570.12 and 6,690.16 is: 10,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,375.76 : 27,570.12 = 6,690.16 : x
  2. Step 2: Convert to fraction form
    18,375.76/27,570.12 = 6,690.16/x
  3. Step 3: Cross multiply
    18,375.76x = 27,570.12 × 6,690.16
  4. Step 4: Simplify right side
    18,375.76x = 184,448,561.03
  5. Step 5: Solve for x
    x = 184,448,561.03/18,375.76
  6. Step 6: Final answer
    x = 10,037.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.