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Finding the Fourth Proportional to 18,540.96, 27,792 and 13,603.20

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Solution

The fourth proportional to 18,540.96, 27,792 and 13,603.20 is: 20,390.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,540.96 : 27,792 = 13,603.20 : x
  2. Step 2: Convert to fraction form
    18,540.96/27,792 = 13,603.20/x
  3. Step 3: Cross multiply
    18,540.96x = 27,792 × 13,603.20
  4. Step 4: Simplify right side
    18,540.96x = 378,060,134.40
  5. Step 5: Solve for x
    x = 378,060,134.40/18,540.96
  6. Step 6: Final answer
    x = 20,390.54

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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.