Home / 20,759.85-31,144.72-6,719.88

Finding the Fourth Proportional to 20,759.85, 31,144.72 and 6,719.88

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Solution

The fourth proportional to 20,759.85, 31,144.72 and 6,719.88 is: 10,081.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.85 : 31,144.72 = 6,719.88 : x
  2. Step 2: Convert to fraction form
    20,759.85/31,144.72 = 6,719.88/x
  3. Step 3: Cross multiply
    20,759.85x = 31,144.72 × 6,719.88
  4. Step 4: Simplify right side
    20,759.85x = 209,288,875.70
  5. Step 5: Solve for x
    x = 209,288,875.70/20,759.85
  6. Step 6: Final answer
    x = 10,081.42

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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.