Home / 8,629.72-12,944.87-2,389.21

Finding the Fourth Proportional to 8,629.72, 12,944.87 and 2,389.21

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Solution

The fourth proportional to 8,629.72, 12,944.87 and 2,389.21 is: 3,583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629.72 : 12,944.87 = 2,389.21 : x
  2. Step 2: Convert to fraction form
    8,629.72/12,944.87 = 2,389.21/x
  3. Step 3: Cross multiply
    8,629.72x = 12,944.87 × 2,389.21
  4. Step 4: Simplify right side
    8,629.72x = 30,928,012.85
  5. Step 5: Solve for x
    x = 30,928,012.85/8,629.72
  6. Step 6: Final answer
    x = 3,583.90

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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.