Home / 8,140.40-12,205.20-3,755.60

Finding the Fourth Proportional to 8,140.40, 12,205.20 and 3,755.60

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Solution

The fourth proportional to 8,140.40, 12,205.20 and 3,755.60 is: 5,630.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.40 : 12,205.20 = 3,755.60 : x
  2. Step 2: Convert to fraction form
    8,140.40/12,205.20 = 3,755.60/x
  3. Step 3: Cross multiply
    8,140.40x = 12,205.20 × 3,755.60
  4. Step 4: Simplify right side
    8,140.40x = 45,837,849.12
  5. Step 5: Solve for x
    x = 45,837,849.12/8,140.40
  6. Step 6: Final answer
    x = 5,630.91

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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.