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Finding the Fourth Proportional to 22,351.14, 30,841.20 and 13,396.68

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Solution

The fourth proportional to 22,351.14, 30,841.20 and 13,396.68 is: 18,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,351.14 : 30,841.20 = 13,396.68 : x
  2. Step 2: Convert to fraction form
    22,351.14/30,841.20 = 13,396.68/x
  3. Step 3: Cross multiply
    22,351.14x = 30,841.20 × 13,396.68
  4. Step 4: Simplify right side
    22,351.14x = 413,169,687.22
  5. Step 5: Solve for x
    x = 413,169,687.22/22,351.14
  6. Step 6: Final answer
    x = 18,485.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.