Home / 8,578.13-12,865.39-2,420.69

Finding the Fourth Proportional to 8,578.13, 12,865.39 and 2,420.69

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Solution

The fourth proportional to 8,578.13, 12,865.39 and 2,420.69 is: 3,630.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.13 : 12,865.39 = 2,420.69 : x
  2. Step 2: Convert to fraction form
    8,578.13/12,865.39 = 2,420.69/x
  3. Step 3: Cross multiply
    8,578.13x = 12,865.39 × 2,420.69
  4. Step 4: Simplify right side
    8,578.13x = 31,143,120.92
  5. Step 5: Solve for x
    x = 31,143,120.92/8,578.13
  6. Step 6: Final answer
    x = 3,630.53

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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.