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Finding the Fourth Proportional to 18,704.71, 28,059.50 and 6,858.46

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Solution

The fourth proportional to 18,704.71, 28,059.50 and 6,858.46 is: 10,288.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.71 : 28,059.50 = 6,858.46 : x
  2. Step 2: Convert to fraction form
    18,704.71/28,059.50 = 6,858.46/x
  3. Step 3: Cross multiply
    18,704.71x = 28,059.50 × 6,858.46
  4. Step 4: Simplify right side
    18,704.71x = 192,444,958.37
  5. Step 5: Solve for x
    x = 192,444,958.37/18,704.71
  6. Step 6: Final answer
    x = 10,288.58

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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.