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Finding the Fourth Proportional to 13,892.80, 20,841.90 and 4,032.40

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Solution

The fourth proportional to 13,892.80, 20,841.90 and 4,032.40 is: 6,049.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.80 : 20,841.90 = 4,032.40 : x
  2. Step 2: Convert to fraction form
    13,892.80/20,841.90 = 4,032.40/x
  3. Step 3: Cross multiply
    13,892.80x = 20,841.90 × 4,032.40
  4. Step 4: Simplify right side
    13,892.80x = 84,042,877.56
  5. Step 5: Solve for x
    x = 84,042,877.56/13,892.80
  6. Step 6: Final answer
    x = 6,049.38

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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.