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Finding the Fourth Proportional to 19,761.76, 27,268.23 and 11,147.56

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Solution

The fourth proportional to 19,761.76, 27,268.23 and 11,147.56 is: 15,381.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,761.76 : 27,268.23 = 11,147.56 : x
  2. Step 2: Convert to fraction form
    19,761.76/27,268.23 = 11,147.56/x
  3. Step 3: Cross multiply
    19,761.76x = 27,268.23 × 11,147.56
  4. Step 4: Simplify right side
    19,761.76x = 303,974,230.02
  5. Step 5: Solve for x
    x = 303,974,230.02/19,761.76
  6. Step 6: Final answer
    x = 15,381.94

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