Home / 20,813.22-31,221.11-7,674.75

Finding the Fourth Proportional to 20,813.22, 31,221.11 and 7,674.75

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Solution

The fourth proportional to 20,813.22, 31,221.11 and 7,674.75 is: 11,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.22 : 31,221.11 = 7,674.75 : x
  2. Step 2: Convert to fraction form
    20,813.22/31,221.11 = 7,674.75/x
  3. Step 3: Cross multiply
    20,813.22x = 31,221.11 × 7,674.75
  4. Step 4: Simplify right side
    20,813.22x = 239,614,233.16
  5. Step 5: Solve for x
    x = 239,614,233.16/20,813.22
  6. Step 6: Final answer
    x = 11,512.60

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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.