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Finding the Fourth Proportional to 20,751.98, 28,640.16 and 11,800.82

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Solution

The fourth proportional to 20,751.98, 28,640.16 and 11,800.82 is: 16,286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.98 : 28,640.16 = 11,800.82 : x
  2. Step 2: Convert to fraction form
    20,751.98/28,640.16 = 11,800.82/x
  3. Step 3: Cross multiply
    20,751.98x = 28,640.16 × 11,800.82
  4. Step 4: Simplify right side
    20,751.98x = 337,977,372.93
  5. Step 5: Solve for x
    x = 337,977,372.93/20,751.98
  6. Step 6: Final answer
    x = 16,286.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.