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Finding the Fourth Proportional to 7,930.72, 11,892 and 2,663.92

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Solution

The fourth proportional to 7,930.72, 11,892 and 2,663.92 is: 3,994.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,930.72 : 11,892 = 2,663.92 : x
  2. Step 2: Convert to fraction form
    7,930.72/11,892 = 2,663.92/x
  3. Step 3: Cross multiply
    7,930.72x = 11,892 × 2,663.92
  4. Step 4: Simplify right side
    7,930.72x = 31,679,336.64
  5. Step 5: Solve for x
    x = 31,679,336.64/7,930.72
  6. Step 6: Final answer
    x = 3,994.51

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.