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Finding the Fourth Proportional to 13,901.42, 20,854.18 and 4,039.42

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Solution

The fourth proportional to 13,901.42, 20,854.18 and 4,039.42 is: 6,059.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,901.42 : 20,854.18 = 4,039.42 : x
  2. Step 2: Convert to fraction form
    13,901.42/20,854.18 = 4,039.42/x
  3. Step 3: Cross multiply
    13,901.42x = 20,854.18 × 4,039.42
  4. Step 4: Simplify right side
    13,901.42x = 84,238,791.78
  5. Step 5: Solve for x
    x = 84,238,791.78/13,901.42
  6. Step 6: Final answer
    x = 6,059.73

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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.