Home / 12,185.70-18,279.21-3,865.08

Finding the Fourth Proportional to 12,185.70, 18,279.21 and 3,865.08

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Solution

The fourth proportional to 12,185.70, 18,279.21 and 3,865.08 is: 5,797.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.70 : 18,279.21 = 3,865.08 : x
  2. Step 2: Convert to fraction form
    12,185.70/18,279.21 = 3,865.08/x
  3. Step 3: Cross multiply
    12,185.70x = 18,279.21 × 3,865.08
  4. Step 4: Simplify right side
    12,185.70x = 70,650,608.99
  5. Step 5: Solve for x
    x = 70,650,608.99/12,185.70
  6. Step 6: Final answer
    x = 5,797.83

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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.