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Finding the Fourth Proportional to 13,911.14, 20,860.11 and 8,069.54

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Solution

The fourth proportional to 13,911.14, 20,860.11 and 8,069.54 is: 12,100.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911.14 : 20,860.11 = 8,069.54 : x
  2. Step 2: Convert to fraction form
    13,911.14/20,860.11 = 8,069.54/x
  3. Step 3: Cross multiply
    13,911.14x = 20,860.11 × 8,069.54
  4. Step 4: Simplify right side
    13,911.14x = 168,331,492.05
  5. Step 5: Solve for x
    x = 168,331,492.05/13,911.14
  6. Step 6: Final answer
    x = 12,100.48

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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.