Home / 13,722.20-20,583.30-8,181.80

Finding the Fourth Proportional to 13,722.20, 20,583.30 and 8,181.80

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Solution

The fourth proportional to 13,722.20, 20,583.30 and 8,181.80 is: 12,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.20 : 20,583.30 = 8,181.80 : x
  2. Step 2: Convert to fraction form
    13,722.20/20,583.30 = 8,181.80/x
  3. Step 3: Cross multiply
    13,722.20x = 20,583.30 × 8,181.80
  4. Step 4: Simplify right side
    13,722.20x = 168,408,443.94
  5. Step 5: Solve for x
    x = 168,408,443.94/13,722.20
  6. Step 6: Final answer
    x = 12,272.70

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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.