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Finding the Fourth Proportional to 18,695.67, 28,062.21 and 13,436.85

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Solution

The fourth proportional to 18,695.67, 28,062.21 and 13,436.85 is: 20,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.67 : 28,062.21 = 13,436.85 : x
  2. Step 2: Convert to fraction form
    18,695.67/28,062.21 = 13,436.85/x
  3. Step 3: Cross multiply
    18,695.67x = 28,062.21 × 13,436.85
  4. Step 4: Simplify right side
    18,695.67x = 377,067,706.44
  5. Step 5: Solve for x
    x = 377,067,706.44/18,695.67
  6. Step 6: Final answer
    x = 20,168.72

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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.