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Finding the Fourth Proportional to 18,795.33, 28,198.53 and 7,109.46

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Solution

The fourth proportional to 18,795.33, 28,198.53 and 7,109.46 is: 10,666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.33 : 28,198.53 = 7,109.46 : x
  2. Step 2: Convert to fraction form
    18,795.33/28,198.53 = 7,109.46/x
  3. Step 3: Cross multiply
    18,795.33x = 28,198.53 × 7,109.46
  4. Step 4: Simplify right side
    18,795.33x = 200,476,321.09
  5. Step 5: Solve for x
    x = 200,476,321.09/18,795.33
  6. Step 6: Final answer
    x = 10,666.28

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1.5x scale

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.