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Finding the Fourth Proportional to 13,961.70, 20,942.55 and 10,851.30

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Solution

The fourth proportional to 13,961.70, 20,942.55 and 10,851.30 is: 16,276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,961.70 : 20,942.55 = 10,851.30 : x
  2. Step 2: Convert to fraction form
    13,961.70/20,942.55 = 10,851.30/x
  3. Step 3: Cross multiply
    13,961.70x = 20,942.55 × 10,851.30
  4. Step 4: Simplify right side
    13,961.70x = 227,253,892.82
  5. Step 5: Solve for x
    x = 227,253,892.82/13,961.70
  6. Step 6: Final answer
    x = 16,276.95

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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.