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Finding the Fourth Proportional to 28,236.82, 42,361.74 and 9,516.40

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Solution

The fourth proportional to 28,236.82, 42,361.74 and 9,516.40 is: 14,276.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.82 : 42,361.74 = 9,516.40 : x
  2. Step 2: Convert to fraction form
    28,236.82/42,361.74 = 9,516.40/x
  3. Step 3: Cross multiply
    28,236.82x = 42,361.74 × 9,516.40
  4. Step 4: Simplify right side
    28,236.82x = 403,131,262.54
  5. Step 5: Solve for x
    x = 403,131,262.54/28,236.82
  6. Step 6: Final answer
    x = 14,276.79

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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.