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Finding the Fourth Proportional to 18,704.70, 28,023.03 and 10,889.82

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Solution

The fourth proportional to 18,704.70, 28,023.03 and 10,889.82 is: 16,314.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.70 : 28,023.03 = 10,889.82 : x
  2. Step 2: Convert to fraction form
    18,704.70/28,023.03 = 10,889.82/x
  3. Step 3: Cross multiply
    18,704.70x = 28,023.03 × 10,889.82
  4. Step 4: Simplify right side
    18,704.70x = 305,165,752.55
  5. Step 5: Solve for x
    x = 305,165,752.55/18,704.70
  6. Step 6: Final answer
    x = 16,314.92

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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.