Home / 12,261.69-18,390.78-3,940.64

Finding the Fourth Proportional to 12,261.69, 18,390.78 and 3,940.64

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Solution

The fourth proportional to 12,261.69, 18,390.78 and 3,940.64 is: 5,910.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.69 : 18,390.78 = 3,940.64 : x
  2. Step 2: Convert to fraction form
    12,261.69/18,390.78 = 3,940.64/x
  3. Step 3: Cross multiply
    12,261.69x = 18,390.78 × 3,940.64
  4. Step 4: Simplify right side
    12,261.69x = 72,471,351.35
  5. Step 5: Solve for x
    x = 72,471,351.35/12,261.69
  6. Step 6: Final answer
    x = 5,910.39

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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.