Home / 20,774.22-31,160.88-5,191.86

Finding the Fourth Proportional to 20,774.22, 31,160.88 and 5,191.86

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Solution

The fourth proportional to 20,774.22, 31,160.88 and 5,191.86 is: 7,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.22 : 31,160.88 = 5,191.86 : x
  2. Step 2: Convert to fraction form
    20,774.22/31,160.88 = 5,191.86/x
  3. Step 3: Cross multiply
    20,774.22x = 31,160.88 × 5,191.86
  4. Step 4: Simplify right side
    20,774.22x = 161,782,926.44
  5. Step 5: Solve for x
    x = 161,782,926.44/20,774.22
  6. Step 6: Final answer
    x = 7,787.68

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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.