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Finding the Fourth Proportional to 20,500.64, 30,755.80 and 6,649.64

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Solution

The fourth proportional to 20,500.64, 30,755.80 and 6,649.64 is: 9,976.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.64 : 30,755.80 = 6,649.64 : x
  2. Step 2: Convert to fraction form
    20,500.64/30,755.80 = 6,649.64/x
  3. Step 3: Cross multiply
    20,500.64x = 30,755.80 × 6,649.64
  4. Step 4: Simplify right side
    20,500.64x = 204,514,997.91
  5. Step 5: Solve for x
    x = 204,514,997.91/20,500.64
  6. Step 6: Final answer
    x = 9,976.03

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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.