Home / 5,121.12-7,684.67-2,159.38

Finding the Fourth Proportional to 5,121.12, 7,684.67 and 2,159.38

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Solution

The fourth proportional to 5,121.12, 7,684.67 and 2,159.38 is: 3,240.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.12 : 7,684.67 = 2,159.38 : x
  2. Step 2: Convert to fraction form
    5,121.12/7,684.67 = 2,159.38/x
  3. Step 3: Cross multiply
    5,121.12x = 7,684.67 × 2,159.38
  4. Step 4: Simplify right side
    5,121.12x = 16,594,122.70
  5. Step 5: Solve for x
    x = 16,594,122.70/5,121.12
  6. Step 6: Final answer
    x = 3,240.33

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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.