Home / 12,121.48-18,185.44-3,801.80

Finding the Fourth Proportional to 12,121.48, 18,185.44 and 3,801.80

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Solution

The fourth proportional to 12,121.48, 18,185.44 and 3,801.80 is: 5,703.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.48 : 18,185.44 = 3,801.80 : x
  2. Step 2: Convert to fraction form
    12,121.48/18,185.44 = 3,801.80/x
  3. Step 3: Cross multiply
    12,121.48x = 18,185.44 × 3,801.80
  4. Step 4: Simplify right side
    12,121.48x = 69,137,405.79
  5. Step 5: Solve for x
    x = 69,137,405.79/12,121.48
  6. Step 6: Final answer
    x = 5,703.71

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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.