Home / 5,639.26-7,782.22-3,121.44

Finding the Fourth Proportional to 5,639.26, 7,782.22 and 3,121.44

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Solution

The fourth proportional to 5,639.26, 7,782.22 and 3,121.44 is: 4,307.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.26 : 7,782.22 = 3,121.44 : x
  2. Step 2: Convert to fraction form
    5,639.26/7,782.22 = 3,121.44/x
  3. Step 3: Cross multiply
    5,639.26x = 7,782.22 × 3,121.44
  4. Step 4: Simplify right side
    5,639.26x = 24,291,732.80
  5. Step 5: Solve for x
    x = 24,291,732.80/5,639.26
  6. Step 6: Final answer
    x = 4,307.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.