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Finding the Fourth Proportional to 20,065.92, 30,100.86 and 6,916.56

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Solution

The fourth proportional to 20,065.92, 30,100.86 and 6,916.56 is: 10,375.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,065.92 : 30,100.86 = 6,916.56 : x
  2. Step 2: Convert to fraction form
    20,065.92/30,100.86 = 6,916.56/x
  3. Step 3: Cross multiply
    20,065.92x = 30,100.86 × 6,916.56
  4. Step 4: Simplify right side
    20,065.92x = 208,194,404.24
  5. Step 5: Solve for x
    x = 208,194,404.24/20,065.92
  6. Step 6: Final answer
    x = 10,375.52

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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.