Home / 13,408.40-20,122.20-5,622.80

Finding the Fourth Proportional to 13,408.40, 20,122.20 and 5,622.80

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Solution

The fourth proportional to 13,408.40, 20,122.20 and 5,622.80 is: 8,438.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.40 : 20,122.20 = 5,622.80 : x
  2. Step 2: Convert to fraction form
    13,408.40/20,122.20 = 5,622.80/x
  3. Step 3: Cross multiply
    13,408.40x = 20,122.20 × 5,622.80
  4. Step 4: Simplify right side
    13,408.40x = 113,143,106.16
  5. Step 5: Solve for x
    x = 113,143,106.16/13,408.40
  6. Step 6: Final answer
    x = 8,438.23

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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.