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Finding the Fourth Proportional to 28,137.96, 38,829.12 and 16,201.68

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Solution

The fourth proportional to 28,137.96, 38,829.12 and 16,201.68 is: 22,357.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.96 : 38,829.12 = 16,201.68 : x
  2. Step 2: Convert to fraction form
    28,137.96/38,829.12 = 16,201.68/x
  3. Step 3: Cross multiply
    28,137.96x = 38,829.12 × 16,201.68
  4. Step 4: Simplify right side
    28,137.96x = 629,096,976.92
  5. Step 5: Solve for x
    x = 629,096,976.92/28,137.96
  6. Step 6: Final answer
    x = 22,357.59

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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.