Home / 8,120.20-12,180.30-3,503.20

Finding the Fourth Proportional to 8,120.20, 12,180.30 and 3,503.20

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Solution

The fourth proportional to 8,120.20, 12,180.30 and 3,503.20 is: 5,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.20 : 12,180.30 = 3,503.20 : x
  2. Step 2: Convert to fraction form
    8,120.20/12,180.30 = 3,503.20/x
  3. Step 3: Cross multiply
    8,120.20x = 12,180.30 × 3,503.20
  4. Step 4: Simplify right side
    8,120.20x = 42,670,026.96
  5. Step 5: Solve for x
    x = 42,670,026.96/8,120.20
  6. Step 6: Final answer
    x = 5,254.80

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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.