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Finding the Fourth Proportional to 20,105.10, 30,157.65 and 18,063.90

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Solution

The fourth proportional to 20,105.10, 30,157.65 and 18,063.90 is: 27,095.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.10 : 30,157.65 = 18,063.90 : x
  2. Step 2: Convert to fraction form
    20,105.10/30,157.65 = 18,063.90/x
  3. Step 3: Cross multiply
    20,105.10x = 30,157.65 × 18,063.90
  4. Step 4: Simplify right side
    20,105.10x = 544,764,773.84
  5. Step 5: Solve for x
    x = 544,764,773.84/20,105.10
  6. Step 6: Final answer
    x = 27,095.85

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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.