Home / 5,385.25-8,078.07-1,687.39

Finding the Fourth Proportional to 5,385.25, 8,078.07 and 1,687.39

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Solution

The fourth proportional to 5,385.25, 8,078.07 and 1,687.39 is: 2,531.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.25 : 8,078.07 = 1,687.39 : x
  2. Step 2: Convert to fraction form
    5,385.25/8,078.07 = 1,687.39/x
  3. Step 3: Cross multiply
    5,385.25x = 8,078.07 × 1,687.39
  4. Step 4: Simplify right side
    5,385.25x = 13,630,854.54
  5. Step 5: Solve for x
    x = 13,630,854.54/5,385.25
  6. Step 6: Final answer
    x = 2,531.15

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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.