Home / 2,613.61-3,914.92-2,121.67

Finding the Fourth Proportional to 2,613.61, 3,914.92 and 2,121.67

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Solution

The fourth proportional to 2,613.61, 3,914.92 and 2,121.67 is: 3,178.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,613.61 : 3,914.92 = 2,121.67 : x
  2. Step 2: Convert to fraction form
    2,613.61/3,914.92 = 2,121.67/x
  3. Step 3: Cross multiply
    2,613.61x = 3,914.92 × 2,121.67
  4. Step 4: Simplify right side
    2,613.61x = 8,306,168.32
  5. Step 5: Solve for x
    x = 8,306,168.32/2,613.61
  6. Step 6: Final answer
    x = 3,178.04

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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.