Home / 3,156.96-4,739.56-2,121.60

Finding the Fourth Proportional to 3,156.96, 4,739.56 and 2,121.60

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Solution

The fourth proportional to 3,156.96, 4,739.56 and 2,121.60 is: 3,185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.96 : 4,739.56 = 2,121.60 : x
  2. Step 2: Convert to fraction form
    3,156.96/4,739.56 = 2,121.60/x
  3. Step 3: Cross multiply
    3,156.96x = 4,739.56 × 2,121.60
  4. Step 4: Simplify right side
    3,156.96x = 10,055,450.50
  5. Step 5: Solve for x
    x = 10,055,450.50/3,156.96
  6. Step 6: Final answer
    x = 3,185.17

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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.