Home / 5,479.45-7,561.67-3,121.61

Finding the Fourth Proportional to 5,479.45, 7,561.67 and 3,121.61

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Solution

The fourth proportional to 5,479.45, 7,561.67 and 3,121.61 is: 4,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.45 : 7,561.67 = 3,121.61 : x
  2. Step 2: Convert to fraction form
    5,479.45/7,561.67 = 3,121.61/x
  3. Step 3: Cross multiply
    5,479.45x = 7,561.67 × 3,121.61
  4. Step 4: Simplify right side
    5,479.45x = 23,604,531.27
  5. Step 5: Solve for x
    x = 23,604,531.27/5,479.45
  6. Step 6: Final answer
    x = 4,307.83

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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.