Home / 3,611.23-5,418.60-1,421.80

Finding the Fourth Proportional to 3,611.23, 5,418.60 and 1,421.80

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Solution

The fourth proportional to 3,611.23, 5,418.60 and 1,421.80 is: 2,133.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.23 : 5,418.60 = 1,421.80 : x
  2. Step 2: Convert to fraction form
    3,611.23/5,418.60 = 1,421.80/x
  3. Step 3: Cross multiply
    3,611.23x = 5,418.60 × 1,421.80
  4. Step 4: Simplify right side
    3,611.23x = 7,704,165.48
  5. Step 5: Solve for x
    x = 7,704,165.48/3,611.23
  6. Step 6: Final answer
    x = 2,133.39

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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.