Home / 7,768.11-11,650.21-2,221.49

Finding the Fourth Proportional to 7,768.11, 11,650.21 and 2,221.49

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Solution

The fourth proportional to 7,768.11, 11,650.21 and 2,221.49 is: 3,331.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.11 : 11,650.21 = 2,221.49 : x
  2. Step 2: Convert to fraction form
    7,768.11/11,650.21 = 2,221.49/x
  3. Step 3: Cross multiply
    7,768.11x = 11,650.21 × 2,221.49
  4. Step 4: Simplify right side
    7,768.11x = 25,880,761.21
  5. Step 5: Solve for x
    x = 25,880,761.21/7,768.11
  6. Step 6: Final answer
    x = 3,331.67

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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.