Home / 3,968.60-5,474.84-2,790.36

Finding the Fourth Proportional to 3,968.60, 5,474.84 and 2,790.36

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Solution

The fourth proportional to 3,968.60, 5,474.84 and 2,790.36 is: 3,849.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.60 : 5,474.84 = 2,790.36 : x
  2. Step 2: Convert to fraction form
    3,968.60/5,474.84 = 2,790.36/x
  3. Step 3: Cross multiply
    3,968.60x = 5,474.84 × 2,790.36
  4. Step 4: Simplify right side
    3,968.60x = 15,276,774.54
  5. Step 5: Solve for x
    x = 15,276,774.54/3,968.60
  6. Step 6: Final answer
    x = 3,849.41

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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.