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Finding the Fourth Proportional to 18,518.46, 27,745.30 and 15,418.40

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Solution

The fourth proportional to 18,518.46, 27,745.30 and 15,418.40 is: 23,100.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.46 : 27,745.30 = 15,418.40 : x
  2. Step 2: Convert to fraction form
    18,518.46/27,745.30 = 15,418.40/x
  3. Step 3: Cross multiply
    18,518.46x = 27,745.30 × 15,418.40
  4. Step 4: Simplify right side
    18,518.46x = 427,788,133.52
  5. Step 5: Solve for x
    x = 427,788,133.52/18,518.46
  6. Step 6: Final answer
    x = 23,100.63

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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.