Home / 8,211.75-12,319.20-3,531.75

Finding the Fourth Proportional to 8,211.75, 12,319.20 and 3,531.75

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Solution

The fourth proportional to 8,211.75, 12,319.20 and 3,531.75 is: 5,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,211.75 : 12,319.20 = 3,531.75 : x
  2. Step 2: Convert to fraction form
    8,211.75/12,319.20 = 3,531.75/x
  3. Step 3: Cross multiply
    8,211.75x = 12,319.20 × 3,531.75
  4. Step 4: Simplify right side
    8,211.75x = 43,508,334.60
  5. Step 5: Solve for x
    x = 43,508,334.60/8,211.75
  6. Step 6: Final answer
    x = 5,298.30

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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.