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Finding the Fourth Proportional to 18,956.61, 28,545.17 and 14,060.97

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Solution

The fourth proportional to 18,956.61, 28,545.17 and 14,060.97 is: 21,173.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.61 : 28,545.17 = 14,060.97 : x
  2. Step 2: Convert to fraction form
    18,956.61/28,545.17 = 14,060.97/x
  3. Step 3: Cross multiply
    18,956.61x = 28,545.17 × 14,060.97
  4. Step 4: Simplify right side
    18,956.61x = 401,372,708.71
  5. Step 5: Solve for x
    x = 401,372,708.71/18,956.61
  6. Step 6: Final answer
    x = 21,173.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.