Home / 20,922.40-31,383.84-6,131.62

Finding the Fourth Proportional to 20,922.40, 31,383.84 and 6,131.62

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Solution

The fourth proportional to 20,922.40, 31,383.84 and 6,131.62 is: 9,197.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.40 : 31,383.84 = 6,131.62 : x
  2. Step 2: Convert to fraction form
    20,922.40/31,383.84 = 6,131.62/x
  3. Step 3: Cross multiply
    20,922.40x = 31,383.84 × 6,131.62
  4. Step 4: Simplify right side
    20,922.40x = 192,433,781.02
  5. Step 5: Solve for x
    x = 192,433,781.02/20,922.40
  6. Step 6: Final answer
    x = 9,197.50

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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.