Home / 5,456.57-8,185.86-3,119.21

Finding the Fourth Proportional to 5,456.57, 8,185.86 and 3,119.21

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Solution

The fourth proportional to 5,456.57, 8,185.86 and 3,119.21 is: 4,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,456.57 : 8,185.86 = 3,119.21 : x
  2. Step 2: Convert to fraction form
    5,456.57/8,185.86 = 3,119.21/x
  3. Step 3: Cross multiply
    5,456.57x = 8,185.86 × 3,119.21
  4. Step 4: Simplify right side
    5,456.57x = 25,533,406.14
  5. Step 5: Solve for x
    x = 25,533,406.14/5,456.57
  6. Step 6: Final answer
    x = 4,679.39

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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.