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Finding the Fourth Proportional to 21,183.71, 31,775.79 and 6,392.76

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Solution

The fourth proportional to 21,183.71, 31,775.79 and 6,392.76 is: 9,589.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.71 : 31,775.79 = 6,392.76 : x
  2. Step 2: Convert to fraction form
    21,183.71/31,775.79 = 6,392.76/x
  3. Step 3: Cross multiply
    21,183.71x = 31,775.79 × 6,392.76
  4. Step 4: Simplify right side
    21,183.71x = 203,134,999.28
  5. Step 5: Solve for x
    x = 203,134,999.28/21,183.71
  6. Step 6: Final answer
    x = 9,589.21

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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.