Home / 12,408.28-17,121.90-7,372.60

Finding the Fourth Proportional to 12,408.28, 17,121.90 and 7,372.60

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Solution

The fourth proportional to 12,408.28, 17,121.90 and 7,372.60 is: 10,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.28 : 17,121.90 = 7,372.60 : x
  2. Step 2: Convert to fraction form
    12,408.28/17,121.90 = 7,372.60/x
  3. Step 3: Cross multiply
    12,408.28x = 17,121.90 × 7,372.60
  4. Step 4: Simplify right side
    12,408.28x = 126,232,919.94
  5. Step 5: Solve for x
    x = 126,232,919.94/12,408.28
  6. Step 6: Final answer
    x = 10,173.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.