Home / 20,203.44-30,318.20-8,516.72

Finding the Fourth Proportional to 20,203.44, 30,318.20 and 8,516.72

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Solution

The fourth proportional to 20,203.44, 30,318.20 and 8,516.72 is: 12,780.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,203.44 : 30,318.20 = 8,516.72 : x
  2. Step 2: Convert to fraction form
    20,203.44/30,318.20 = 8,516.72/x
  3. Step 3: Cross multiply
    20,203.44x = 30,318.20 × 8,516.72
  4. Step 4: Simplify right side
    20,203.44x = 258,211,620.30
  5. Step 5: Solve for x
    x = 258,211,620.30/20,203.44
  6. Step 6: Final answer
    x = 12,780.58

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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.