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Finding the Fourth Proportional to 18,288.74, 25,238.43 and 11,120.99

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Solution

The fourth proportional to 18,288.74, 25,238.43 and 11,120.99 is: 15,346.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,288.74 : 25,238.43 = 11,120.99 : x
  2. Step 2: Convert to fraction form
    18,288.74/25,238.43 = 11,120.99/x
  3. Step 3: Cross multiply
    18,288.74x = 25,238.43 × 11,120.99
  4. Step 4: Simplify right side
    18,288.74x = 280,676,201.45
  5. Step 5: Solve for x
    x = 280,676,201.45/18,288.74
  6. Step 6: Final answer
    x = 15,346.94

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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.