Home / 2,163.60-3,245.40-2,115.60

Finding the Fourth Proportional to 2,163.60, 3,245.40 and 2,115.60

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Solution

The fourth proportional to 2,163.60, 3,245.40 and 2,115.60 is: 3,173.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,163.60 : 3,245.40 = 2,115.60 : x
  2. Step 2: Convert to fraction form
    2,163.60/3,245.40 = 2,115.60/x
  3. Step 3: Cross multiply
    2,163.60x = 3,245.40 × 2,115.60
  4. Step 4: Simplify right side
    2,163.60x = 6,865,968.24
  5. Step 5: Solve for x
    x = 6,865,968.24/2,163.60
  6. Step 6: Final answer
    x = 3,173.40

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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.