Home / 12,189.35-18,286.76-3,869.64

Finding the Fourth Proportional to 12,189.35, 18,286.76 and 3,869.64

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Solution

The fourth proportional to 12,189.35, 18,286.76 and 3,869.64 is: 5,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,189.35 : 18,286.76 = 3,869.64 : x
  2. Step 2: Convert to fraction form
    12,189.35/18,286.76 = 3,869.64/x
  3. Step 3: Cross multiply
    12,189.35x = 18,286.76 × 3,869.64
  4. Step 4: Simplify right side
    12,189.35x = 70,763,158.62
  5. Step 5: Solve for x
    x = 70,763,158.62/12,189.35
  6. Step 6: Final answer
    x = 5,805.33

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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.