Home / 12,439.80-18,662.22-4,120.20

Finding the Fourth Proportional to 12,439.80, 18,662.22 and 4,120.20

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Solution

The fourth proportional to 12,439.80, 18,662.22 and 4,120.20 is: 6,181.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.80 : 18,662.22 = 4,120.20 : x
  2. Step 2: Convert to fraction form
    12,439.80/18,662.22 = 4,120.20/x
  3. Step 3: Cross multiply
    12,439.80x = 18,662.22 × 4,120.20
  4. Step 4: Simplify right side
    12,439.80x = 76,892,078.84
  5. Step 5: Solve for x
    x = 76,892,078.84/12,439.80
  6. Step 6: Final answer
    x = 6,181.13

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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.