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Finding the Fourth Proportional to 18,857.91, 28,296.68 and 7,616.02

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Solution

The fourth proportional to 18,857.91, 28,296.68 and 7,616.02 is: 11,427.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857.91 : 28,296.68 = 7,616.02 : x
  2. Step 2: Convert to fraction form
    18,857.91/28,296.68 = 7,616.02/x
  3. Step 3: Cross multiply
    18,857.91x = 28,296.68 × 7,616.02
  4. Step 4: Simplify right side
    18,857.91x = 215,508,080.81
  5. Step 5: Solve for x
    x = 215,508,080.81/18,857.91
  6. Step 6: Final answer
    x = 11,427.99

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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.