Home / 8,138.06-12,209.52-4,245.20

Finding the Fourth Proportional to 8,138.06, 12,209.52 and 4,245.20

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Solution

The fourth proportional to 8,138.06, 12,209.52 and 4,245.20 is: 6,369.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.06 : 12,209.52 = 4,245.20 : x
  2. Step 2: Convert to fraction form
    8,138.06/12,209.52 = 4,245.20/x
  3. Step 3: Cross multiply
    8,138.06x = 12,209.52 × 4,245.20
  4. Step 4: Simplify right side
    8,138.06x = 51,831,854.30
  5. Step 5: Solve for x
    x = 51,831,854.30/8,138.06
  6. Step 6: Final answer
    x = 6,369.07

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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.