Home / 4,921.36-7,378.80-4,195.60

Finding the Fourth Proportional to 4,921.36, 7,378.80 and 4,195.60

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Solution

The fourth proportional to 4,921.36, 7,378.80 and 4,195.60 is: 6,290.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.36 : 7,378.80 = 4,195.60 : x
  2. Step 2: Convert to fraction form
    4,921.36/7,378.80 = 4,195.60/x
  3. Step 3: Cross multiply
    4,921.36x = 7,378.80 × 4,195.60
  4. Step 4: Simplify right side
    4,921.36x = 30,958,493.28
  5. Step 5: Solve for x
    x = 30,958,493.28/4,921.36
  6. Step 6: Final answer
    x = 6,290.64

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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.