Home / 5,409.30-7,464.92-3,172.78

Finding the Fourth Proportional to 5,409.30, 7,464.92 and 3,172.78

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Solution

The fourth proportional to 5,409.30, 7,464.92 and 3,172.78 is: 4,378.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409.30 : 7,464.92 = 3,172.78 : x
  2. Step 2: Convert to fraction form
    5,409.30/7,464.92 = 3,172.78/x
  3. Step 3: Cross multiply
    5,409.30x = 7,464.92 × 3,172.78
  4. Step 4: Simplify right side
    5,409.30x = 23,684,548.88
  5. Step 5: Solve for x
    x = 23,684,548.88/5,409.30
  6. Step 6: Final answer
    x = 4,378.49

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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.