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Finding the Fourth Proportional to 18,891.98, 28,339.60 and 9,039.14

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Solution

The fourth proportional to 18,891.98, 28,339.60 and 9,039.14 is: 13,559.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.98 : 28,339.60 = 9,039.14 : x
  2. Step 2: Convert to fraction form
    18,891.98/28,339.60 = 9,039.14/x
  3. Step 3: Cross multiply
    18,891.98x = 28,339.60 × 9,039.14
  4. Step 4: Simplify right side
    18,891.98x = 256,165,611.94
  5. Step 5: Solve for x
    x = 256,165,611.94/18,891.98
  6. Step 6: Final answer
    x = 13,559.49

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Similar ratio
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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.