Home / 3,405.36-5,108.40-2,115.84

Finding the Fourth Proportional to 3,405.36, 5,108.40 and 2,115.84

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Solution

The fourth proportional to 3,405.36, 5,108.40 and 2,115.84 is: 3,173.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.36 : 5,108.40 = 2,115.84 : x
  2. Step 2: Convert to fraction form
    3,405.36/5,108.40 = 2,115.84/x
  3. Step 3: Cross multiply
    3,405.36x = 5,108.40 × 2,115.84
  4. Step 4: Simplify right side
    3,405.36x = 10,808,557.06
  5. Step 5: Solve for x
    x = 10,808,557.06/3,405.36
  6. Step 6: Final answer
    x = 3,173.98

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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.