Home / 12,076.80-18,115.20-4,286.40

Finding the Fourth Proportional to 12,076.80, 18,115.20 and 4,286.40

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Solution

The fourth proportional to 12,076.80, 18,115.20 and 4,286.40 is: 6,429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,076.80 : 18,115.20 = 4,286.40 : x
  2. Step 2: Convert to fraction form
    12,076.80/18,115.20 = 4,286.40/x
  3. Step 3: Cross multiply
    12,076.80x = 18,115.20 × 4,286.40
  4. Step 4: Simplify right side
    12,076.80x = 77,648,993.28
  5. Step 5: Solve for x
    x = 77,648,993.28/12,076.80
  6. Step 6: Final answer
    x = 6,429.60

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Similar ratio
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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.