Home / 18,747.56-28,121.32-7,659.46

Finding the Fourth Proportional to 18,747.56, 28,121.32 and 7,659.46

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Solution

The fourth proportional to 18,747.56, 28,121.32 and 7,659.46 is: 11,489.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.56 : 28,121.32 = 7,659.46 : x
  2. Step 2: Convert to fraction form
    18,747.56/28,121.32 = 7,659.46/x
  3. Step 3: Cross multiply
    18,747.56x = 28,121.32 × 7,659.46
  4. Step 4: Simplify right side
    18,747.56x = 215,394,125.69
  5. Step 5: Solve for x
    x = 215,394,125.69/18,747.56
  6. Step 6: Final answer
    x = 11,489.18

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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.