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Finding the Fourth Proportional to 7,092.72, 9,788.02 and 3,906.36

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Solution

The fourth proportional to 7,092.72, 9,788.02 and 3,906.36 is: 5,390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,092.72 : 9,788.02 = 3,906.36 : x
  2. Step 2: Convert to fraction form
    7,092.72/9,788.02 = 3,906.36/x
  3. Step 3: Cross multiply
    7,092.72x = 9,788.02 × 3,906.36
  4. Step 4: Simplify right side
    7,092.72x = 38,235,529.81
  5. Step 5: Solve for x
    x = 38,235,529.81/7,092.72
  6. Step 6: Final answer
    x = 5,390.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.