Home / 20,771.56-31,157.52-6,920.56

Finding the Fourth Proportional to 20,771.56, 31,157.52 and 6,920.56

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Solution

The fourth proportional to 20,771.56, 31,157.52 and 6,920.56 is: 10,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.56 : 31,157.52 = 6,920.56 : x
  2. Step 2: Convert to fraction form
    20,771.56/31,157.52 = 6,920.56/x
  3. Step 3: Cross multiply
    20,771.56x = 31,157.52 × 6,920.56
  4. Step 4: Simplify right side
    20,771.56x = 215,627,486.61
  5. Step 5: Solve for x
    x = 215,627,486.61/20,771.56
  6. Step 6: Final answer
    x = 10,380.90

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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.