Home / 20,163.21-30,244.72-7,680.30

Finding the Fourth Proportional to 20,163.21, 30,244.72 and 7,680.30

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Solution

The fourth proportional to 20,163.21, 30,244.72 and 7,680.30 is: 11,520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.21 : 30,244.72 = 7,680.30 : x
  2. Step 2: Convert to fraction form
    20,163.21/30,244.72 = 7,680.30/x
  3. Step 3: Cross multiply
    20,163.21x = 30,244.72 × 7,680.30
  4. Step 4: Simplify right side
    20,163.21x = 232,288,523.02
  5. Step 5: Solve for x
    x = 232,288,523.02/20,163.21
  6. Step 6: Final answer
    x = 11,520.41

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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.