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Finding the Fourth Proportional to 18,819, 28,322.91 and 14,163.12

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Solution

The fourth proportional to 18,819, 28,322.91 and 14,163.12 is: 21,315.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819 : 28,322.91 = 14,163.12 : x
  2. Step 2: Convert to fraction form
    18,819/28,322.91 = 14,163.12/x
  3. Step 3: Cross multiply
    18,819x = 28,322.91 × 14,163.12
  4. Step 4: Simplify right side
    18,819x = 401,140,773.08
  5. Step 5: Solve for x
    x = 401,140,773.08/18,819
  6. Step 6: Final answer
    x = 21,315.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.