Home / 5,405.60-8,108.40-2,121.04

Finding the Fourth Proportional to 5,405.60, 8,108.40 and 2,121.04

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Solution

The fourth proportional to 5,405.60, 8,108.40 and 2,121.04 is: 3,181.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.60 : 8,108.40 = 2,121.04 : x
  2. Step 2: Convert to fraction form
    5,405.60/8,108.40 = 2,121.04/x
  3. Step 3: Cross multiply
    5,405.60x = 8,108.40 × 2,121.04
  4. Step 4: Simplify right side
    5,405.60x = 17,198,240.74
  5. Step 5: Solve for x
    x = 17,198,240.74/5,405.60
  6. Step 6: Final answer
    x = 3,181.56

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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.