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Finding the Fourth Proportional to 6,140.80, 9,205.80 and 3,676.60

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Solution

The fourth proportional to 6,140.80, 9,205.80 and 3,676.60 is: 5,511.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,140.80 : 9,205.80 = 3,676.60 : x
  2. Step 2: Convert to fraction form
    6,140.80/9,205.80 = 3,676.60/x
  3. Step 3: Cross multiply
    6,140.80x = 9,205.80 × 3,676.60
  4. Step 4: Simplify right side
    6,140.80x = 33,846,044.28
  5. Step 5: Solve for x
    x = 33,846,044.28/6,140.80
  6. Step 6: Final answer
    x = 5,511.67

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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.