Home / 5,408.40-8,115.12-5,321.04

Finding the Fourth Proportional to 5,408.40, 8,115.12 and 5,321.04

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Solution

The fourth proportional to 5,408.40, 8,115.12 and 5,321.04 is: 7,984.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,408.40 : 8,115.12 = 5,321.04 : x
  2. Step 2: Convert to fraction form
    5,408.40/8,115.12 = 5,321.04/x
  3. Step 3: Cross multiply
    5,408.40x = 8,115.12 × 5,321.04
  4. Step 4: Simplify right side
    5,408.40x = 43,180,878.12
  5. Step 5: Solve for x
    x = 43,180,878.12/5,408.40
  6. Step 6: Final answer
    x = 7,984.04

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1.5x scale

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.