Home / 5,138.66-7,708.32-1,628.78

Finding the Fourth Proportional to 5,138.66, 7,708.32 and 1,628.78

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Solution

The fourth proportional to 5,138.66, 7,708.32 and 1,628.78 is: 2,443.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.66 : 7,708.32 = 1,628.78 : x
  2. Step 2: Convert to fraction form
    5,138.66/7,708.32 = 1,628.78/x
  3. Step 3: Cross multiply
    5,138.66x = 7,708.32 × 1,628.78
  4. Step 4: Simplify right side
    5,138.66x = 12,555,157.45
  5. Step 5: Solve for x
    x = 12,555,157.45/5,138.66
  6. Step 6: Final answer
    x = 2,443.27

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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.