Home / 5,121.57-7,682.32-2,928.75

Finding the Fourth Proportional to 5,121.57, 7,682.32 and 2,928.75

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Solution

The fourth proportional to 5,121.57, 7,682.32 and 2,928.75 is: 4,393.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.57 : 7,682.32 = 2,928.75 : x
  2. Step 2: Convert to fraction form
    5,121.57/7,682.32 = 2,928.75/x
  3. Step 3: Cross multiply
    5,121.57x = 7,682.32 × 2,928.75
  4. Step 4: Simplify right side
    5,121.57x = 22,499,594.70
  5. Step 5: Solve for x
    x = 22,499,594.70/5,121.57
  6. Step 6: Final answer
    x = 4,393.10

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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.