Home / 7,211.12-9,951.36-3,899.12

Finding the Fourth Proportional to 7,211.12, 9,951.36 and 3,899.12

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Solution

The fourth proportional to 7,211.12, 9,951.36 and 3,899.12 is: 5,380.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.12 : 9,951.36 = 3,899.12 : x
  2. Step 2: Convert to fraction form
    7,211.12/9,951.36 = 3,899.12/x
  3. Step 3: Cross multiply
    7,211.12x = 9,951.36 × 3,899.12
  4. Step 4: Simplify right side
    7,211.12x = 38,801,546.80
  5. Step 5: Solve for x
    x = 38,801,546.80/7,211.12
  6. Step 6: Final answer
    x = 5,380.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.