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Finding the Fourth Proportional to 19,894.62, 27,447.85 and 11,279.89

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Solution

The fourth proportional to 19,894.62, 27,447.85 and 11,279.89 is: 15,562.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,894.62 : 27,447.85 = 11,279.89 : x
  2. Step 2: Convert to fraction form
    19,894.62/27,447.85 = 11,279.89/x
  3. Step 3: Cross multiply
    19,894.62x = 27,447.85 × 11,279.89
  4. Step 4: Simplify right side
    19,894.62x = 309,608,728.74
  5. Step 5: Solve for x
    x = 309,608,728.74/19,894.62
  6. Step 6: Final answer
    x = 15,562.43

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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.