Home / 20,190.72-30,305.52-18,917.44

Finding the Fourth Proportional to 20,190.72, 30,305.52 and 18,917.44

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Solution

The fourth proportional to 20,190.72, 30,305.52 and 18,917.44 is: 28,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.72 : 30,305.52 = 18,917.44 : x
  2. Step 2: Convert to fraction form
    20,190.72/30,305.52 = 18,917.44/x
  3. Step 3: Cross multiply
    20,190.72x = 30,305.52 × 18,917.44
  4. Step 4: Simplify right side
    20,190.72x = 573,302,856.27
  5. Step 5: Solve for x
    x = 573,302,856.27/20,190.72
  6. Step 6: Final answer
    x = 28,394.37

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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.