Home / 5,128.54-7,694.94-2,458.78

Finding the Fourth Proportional to 5,128.54, 7,694.94 and 2,458.78

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Solution

The fourth proportional to 5,128.54, 7,694.94 and 2,458.78 is: 3,689.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.54 : 7,694.94 = 2,458.78 : x
  2. Step 2: Convert to fraction form
    5,128.54/7,694.94 = 2,458.78/x
  3. Step 3: Cross multiply
    5,128.54x = 7,694.94 × 2,458.78
  4. Step 4: Simplify right side
    5,128.54x = 18,920,164.57
  5. Step 5: Solve for x
    x = 18,920,164.57/5,128.54
  6. Step 6: Final answer
    x = 3,689.19

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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.