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Finding the Fourth Proportional to 20,850.62, 28,773.86 and 11,898.32

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Solution

The fourth proportional to 20,850.62, 28,773.86 and 11,898.32 is: 16,419.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.62 : 28,773.86 = 11,898.32 : x
  2. Step 2: Convert to fraction form
    20,850.62/28,773.86 = 11,898.32/x
  3. Step 3: Cross multiply
    20,850.62x = 28,773.86 × 11,898.32
  4. Step 4: Simplify right side
    20,850.62x = 342,360,390.55
  5. Step 5: Solve for x
    x = 342,360,390.55/20,850.62
  6. Step 6: Final answer
    x = 16,419.68

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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.