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Finding the Fourth Proportional to 20,108.60, 30,043.90 and 19,419.56

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Solution

The fourth proportional to 20,108.60, 30,043.90 and 19,419.56 is: 29,014.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.60 : 30,043.90 = 19,419.56 : x
  2. Step 2: Convert to fraction form
    20,108.60/30,043.90 = 19,419.56/x
  3. Step 3: Cross multiply
    20,108.60x = 30,043.90 × 19,419.56
  4. Step 4: Simplify right side
    20,108.60x = 583,439,318.68
  5. Step 5: Solve for x
    x = 583,439,318.68/20,108.60
  6. Step 6: Final answer
    x = 29,014.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.