Home / 5,418.39-8,128.25-1,719.33

Finding the Fourth Proportional to 5,418.39, 8,128.25 and 1,719.33

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Solution

The fourth proportional to 5,418.39, 8,128.25 and 1,719.33 is: 2,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.39 : 8,128.25 = 1,719.33 : x
  2. Step 2: Convert to fraction form
    5,418.39/8,128.25 = 1,719.33/x
  3. Step 3: Cross multiply
    5,418.39x = 8,128.25 × 1,719.33
  4. Step 4: Simplify right side
    5,418.39x = 13,975,111.44
  5. Step 5: Solve for x
    x = 13,975,111.44/5,418.39
  6. Step 6: Final answer
    x = 2,579.20

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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.