Home / 5,217.12-7,199.76-3,121.44

Finding the Fourth Proportional to 5,217.12, 7,199.76 and 3,121.44

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Solution

The fourth proportional to 5,217.12, 7,199.76 and 3,121.44 is: 4,307.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,217.12 : 7,199.76 = 3,121.44 : x
  2. Step 2: Convert to fraction form
    5,217.12/7,199.76 = 3,121.44/x
  3. Step 3: Cross multiply
    5,217.12x = 7,199.76 × 3,121.44
  4. Step 4: Simplify right side
    5,217.12x = 22,473,618.85
  5. Step 5: Solve for x
    x = 22,473,618.85/5,217.12
  6. Step 6: Final answer
    x = 4,307.67

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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.