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Finding the Fourth Proportional to 18,745.43, 28,104.09 and 11,348.10

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Solution

The fourth proportional to 18,745.43, 28,104.09 and 11,348.10 is: 17,013.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.43 : 28,104.09 = 11,348.10 : x
  2. Step 2: Convert to fraction form
    18,745.43/28,104.09 = 11,348.10/x
  3. Step 3: Cross multiply
    18,745.43x = 28,104.09 × 11,348.10
  4. Step 4: Simplify right side
    18,745.43x = 318,928,023.73
  5. Step 5: Solve for x
    x = 318,928,023.73/18,745.43
  6. Step 6: Final answer
    x = 17,013.65

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1.5x scale

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.