Home / 3,918.80-5,408.03-2,150.40

Finding the Fourth Proportional to 3,918.80, 5,408.03 and 2,150.40

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Solution

The fourth proportional to 3,918.80, 5,408.03 and 2,150.40 is: 2,967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.80 : 5,408.03 = 2,150.40 : x
  2. Step 2: Convert to fraction form
    3,918.80/5,408.03 = 2,150.40/x
  3. Step 3: Cross multiply
    3,918.80x = 5,408.03 × 2,150.40
  4. Step 4: Simplify right side
    3,918.80x = 11,629,416.96
  5. Step 5: Solve for x
    x = 11,629,416.96/3,918.80
  6. Step 6: Final answer
    x = 2,967.60

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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.