Home / 20,885.74-31,336.80-9,190.75

Finding the Fourth Proportional to 20,885.74, 31,336.80 and 9,190.75

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Solution

The fourth proportional to 20,885.74, 31,336.80 and 9,190.75 is: 13,789.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.74 : 31,336.80 = 9,190.75 : x
  2. Step 2: Convert to fraction form
    20,885.74/31,336.80 = 9,190.75/x
  3. Step 3: Cross multiply
    20,885.74x = 31,336.80 × 9,190.75
  4. Step 4: Simplify right side
    20,885.74x = 288,008,694.60
  5. Step 5: Solve for x
    x = 288,008,694.60/20,885.74
  6. Step 6: Final answer
    x = 13,789.73

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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.