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Finding the Fourth Proportional to 20,968.16, 31,452.48 and 8,321.01

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Solution

The fourth proportional to 20,968.16, 31,452.48 and 8,321.01 is: 12,481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.16 : 31,452.48 = 8,321.01 : x
  2. Step 2: Convert to fraction form
    20,968.16/31,452.48 = 8,321.01/x
  3. Step 3: Cross multiply
    20,968.16x = 31,452.48 × 8,321.01
  4. Step 4: Simplify right side
    20,968.16x = 261,716,400.60
  5. Step 5: Solve for x
    x = 261,716,400.60/20,968.16
  6. Step 6: Final answer
    x = 12,481.61

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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.