Home / 8,480.45-12,720.81-3,217.91

Finding the Fourth Proportional to 8,480.45, 12,720.81 and 3,217.91

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Solution

The fourth proportional to 8,480.45, 12,720.81 and 3,217.91 is: 4,826.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.45 : 12,720.81 = 3,217.91 : x
  2. Step 2: Convert to fraction form
    8,480.45/12,720.81 = 3,217.91/x
  3. Step 3: Cross multiply
    8,480.45x = 12,720.81 × 3,217.91
  4. Step 4: Simplify right side
    8,480.45x = 40,934,358.10
  5. Step 5: Solve for x
    x = 40,934,358.10/8,480.45
  6. Step 6: Final answer
    x = 4,826.91

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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.