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Finding the Fourth Proportional to 18,795.69, 28,191.09 and 7,107.39

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Solution

The fourth proportional to 18,795.69, 28,191.09 and 7,107.39 is: 10,660.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.69 : 28,191.09 = 7,107.39 : x
  2. Step 2: Convert to fraction form
    18,795.69/28,191.09 = 7,107.39/x
  3. Step 3: Cross multiply
    18,795.69x = 28,191.09 × 7,107.39
  4. Step 4: Simplify right side
    18,795.69x = 200,365,071.16
  5. Step 5: Solve for x
    x = 200,365,071.16/18,795.69
  6. Step 6: Final answer
    x = 10,660.16

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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.