Home / 5,408.19-8,114.40-2,120.72

Finding the Fourth Proportional to 5,408.19, 8,114.40 and 2,120.72

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Solution

The fourth proportional to 5,408.19, 8,114.40 and 2,120.72 is: 3,181.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,408.19 : 8,114.40 = 2,120.72 : x
  2. Step 2: Convert to fraction form
    5,408.19/8,114.40 = 2,120.72/x
  3. Step 3: Cross multiply
    5,408.19x = 8,114.40 × 2,120.72
  4. Step 4: Simplify right side
    5,408.19x = 17,208,329.80
  5. Step 5: Solve for x
    x = 17,208,329.80/5,408.19
  6. Step 6: Final answer
    x = 3,181.90

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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.