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Finding the Fourth Proportional to 19,883.25, 27,440.70 and 11,388.12

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Solution

The fourth proportional to 19,883.25, 27,440.70 and 11,388.12 is: 15,716.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,883.25 : 27,440.70 = 11,388.12 : x
  2. Step 2: Convert to fraction form
    19,883.25/27,440.70 = 11,388.12/x
  3. Step 3: Cross multiply
    19,883.25x = 27,440.70 × 11,388.12
  4. Step 4: Simplify right side
    19,883.25x = 312,497,948.08
  5. Step 5: Solve for x
    x = 312,497,948.08/19,883.25
  6. Step 6: Final answer
    x = 15,716.65

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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.