Home / 3,918.54-5,408.55-2,661.69

Finding the Fourth Proportional to 3,918.54, 5,408.55 and 2,661.69

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Solution

The fourth proportional to 3,918.54, 5,408.55 and 2,661.69 is: 3,673.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.54 : 5,408.55 = 2,661.69 : x
  2. Step 2: Convert to fraction form
    3,918.54/5,408.55 = 2,661.69/x
  3. Step 3: Cross multiply
    3,918.54x = 5,408.55 × 2,661.69
  4. Step 4: Simplify right side
    3,918.54x = 14,395,883.45
  5. Step 5: Solve for x
    x = 14,395,883.45/3,918.54
  6. Step 6: Final answer
    x = 3,673.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.