Home / 13,408.40-20,112.60-8,451.20

Finding the Fourth Proportional to 13,408.40, 20,112.60 and 8,451.20

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Solution

The fourth proportional to 13,408.40, 20,112.60 and 8,451.20 is: 12,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.40 : 20,112.60 = 8,451.20 : x
  2. Step 2: Convert to fraction form
    13,408.40/20,112.60 = 8,451.20/x
  3. Step 3: Cross multiply
    13,408.40x = 20,112.60 × 8,451.20
  4. Step 4: Simplify right side
    13,408.40x = 169,975,605.12
  5. Step 5: Solve for x
    x = 169,975,605.12/13,408.40
  6. Step 6: Final answer
    x = 12,676.80

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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.