Home / 12,185.55-18,278.97-3,866.21

Finding the Fourth Proportional to 12,185.55, 18,278.97 and 3,866.21

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Solution

The fourth proportional to 12,185.55, 18,278.97 and 3,866.21 is: 5,799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.55 : 18,278.97 = 3,866.21 : x
  2. Step 2: Convert to fraction form
    12,185.55/18,278.97 = 3,866.21/x
  3. Step 3: Cross multiply
    12,185.55x = 18,278.97 × 3,866.21
  4. Step 4: Simplify right side
    12,185.55x = 70,670,245.21
  5. Step 5: Solve for x
    x = 70,670,245.21/12,185.55
  6. Step 6: Final answer
    x = 5,799.51

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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.