Home / 11,211.92-16,819.68-3,420.08

Finding the Fourth Proportional to 11,211.92, 16,819.68 and 3,420.08

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Solution

The fourth proportional to 11,211.92, 16,819.68 and 3,420.08 is: 5,130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,211.92 : 16,819.68 = 3,420.08 : x
  2. Step 2: Convert to fraction form
    11,211.92/16,819.68 = 3,420.08/x
  3. Step 3: Cross multiply
    11,211.92x = 16,819.68 × 3,420.08
  4. Step 4: Simplify right side
    11,211.92x = 57,524,651.17
  5. Step 5: Solve for x
    x = 57,524,651.17/11,211.92
  6. Step 6: Final answer
    x = 5,130.67

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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.