Home / 4,321.21-6,481.54-2,128

Finding the Fourth Proportional to 4,321.21, 6,481.54 and 2,128

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Solution

The fourth proportional to 4,321.21, 6,481.54 and 2,128 is: 3,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.21 : 6,481.54 = 2,128 : x
  2. Step 2: Convert to fraction form
    4,321.21/6,481.54 = 2,128/x
  3. Step 3: Cross multiply
    4,321.21x = 6,481.54 × 2,128
  4. Step 4: Simplify right side
    4,321.21x = 13,792,717.12
  5. Step 5: Solve for x
    x = 13,792,717.12/4,321.21
  6. Step 6: Final answer
    x = 3,191.86

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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.