Home / 20,378.45-30,508.42-11,919.01

Finding the Fourth Proportional to 20,378.45, 30,508.42 and 11,919.01

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Solution

The fourth proportional to 20,378.45, 30,508.42 and 11,919.01 is: 17,843.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.45 : 30,508.42 = 11,919.01 : x
  2. Step 2: Convert to fraction form
    20,378.45/30,508.42 = 11,919.01/x
  3. Step 3: Cross multiply
    20,378.45x = 30,508.42 × 11,919.01
  4. Step 4: Simplify right side
    20,378.45x = 363,630,163.06
  5. Step 5: Solve for x
    x = 363,630,163.06/20,378.45
  6. Step 6: Final answer
    x = 17,843.86

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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.