Home / 18,639.66-27,912.74-11,138.60

Finding the Fourth Proportional to 18,639.66, 27,912.74 and 11,138.60

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Solution

The fourth proportional to 18,639.66, 27,912.74 and 11,138.60 is: 16,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.66 : 27,912.74 = 11,138.60 : x
  2. Step 2: Convert to fraction form
    18,639.66/27,912.74 = 11,138.60/x
  3. Step 3: Cross multiply
    18,639.66x = 27,912.74 × 11,138.60
  4. Step 4: Simplify right side
    18,639.66x = 310,908,845.76
  5. Step 5: Solve for x
    x = 310,908,845.76/18,639.66
  6. Step 6: Final answer
    x = 16,679.96

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Why These Related Problems?

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