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Finding the Fourth Proportional to 19,251.78, 28,894.17 and 13,718.70

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Solution

The fourth proportional to 19,251.78, 28,894.17 and 13,718.70 is: 20,589.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.78 : 28,894.17 = 13,718.70 : x
  2. Step 2: Convert to fraction form
    19,251.78/28,894.17 = 13,718.70/x
  3. Step 3: Cross multiply
    19,251.78x = 28,894.17 × 13,718.70
  4. Step 4: Simplify right side
    19,251.78x = 396,390,449.98
  5. Step 5: Solve for x
    x = 396,390,449.98/19,251.78
  6. Step 6: Final answer
    x = 20,589.81

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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.