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Finding the Fourth Proportional to 15,755.57, 21,743.13 and 8,682.44

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Solution

The fourth proportional to 15,755.57, 21,743.13 and 8,682.44 is: 11,982.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.57 : 21,743.13 = 8,682.44 : x
  2. Step 2: Convert to fraction form
    15,755.57/21,743.13 = 8,682.44/x
  3. Step 3: Cross multiply
    15,755.57x = 21,743.13 × 8,682.44
  4. Step 4: Simplify right side
    15,755.57x = 188,783,421.64
  5. Step 5: Solve for x
    x = 188,783,421.64/15,755.57
  6. Step 6: Final answer
    x = 11,982.02

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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.