Home / 20,906.40-31,383.90-11,040.60

Finding the Fourth Proportional to 20,906.40, 31,383.90 and 11,040.60

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Solution

The fourth proportional to 20,906.40, 31,383.90 and 11,040.60 is: 16,573.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.40 : 31,383.90 = 11,040.60 : x
  2. Step 2: Convert to fraction form
    20,906.40/31,383.90 = 11,040.60/x
  3. Step 3: Cross multiply
    20,906.40x = 31,383.90 × 11,040.60
  4. Step 4: Simplify right side
    20,906.40x = 346,497,086.34
  5. Step 5: Solve for x
    x = 346,497,086.34/20,906.40
  6. Step 6: Final answer
    x = 16,573.73

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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.