Home / 5,418.21-8,128.33-1,719.44

Finding the Fourth Proportional to 5,418.21, 8,128.33 and 1,719.44

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Solution

The fourth proportional to 5,418.21, 8,128.33 and 1,719.44 is: 2,579.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.21 : 8,128.33 = 1,719.44 : x
  2. Step 2: Convert to fraction form
    5,418.21/8,128.33 = 1,719.44/x
  3. Step 3: Cross multiply
    5,418.21x = 8,128.33 × 1,719.44
  4. Step 4: Simplify right side
    5,418.21x = 13,976,199.77
  5. Step 5: Solve for x
    x = 13,976,199.77/5,418.21
  6. Step 6: Final answer
    x = 2,579.49

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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.