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Finding the Fourth Proportional to 18,889.66, 28,338.54 and 5,743.09

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Solution

The fourth proportional to 18,889.66, 28,338.54 and 5,743.09 is: 8,615.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.66 : 28,338.54 = 5,743.09 : x
  2. Step 2: Convert to fraction form
    18,889.66/28,338.54 = 5,743.09/x
  3. Step 3: Cross multiply
    18,889.66x = 28,338.54 × 5,743.09
  4. Step 4: Simplify right side
    18,889.66x = 162,750,785.69
  5. Step 5: Solve for x
    x = 162,750,785.69/18,889.66
  6. Step 6: Final answer
    x = 8,615.87

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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.