Home / 5,187.81-7,158.90-3,198.54

Finding the Fourth Proportional to 5,187.81, 7,158.90 and 3,198.54

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Solution

The fourth proportional to 5,187.81, 7,158.90 and 3,198.54 is: 4,413.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.81 : 7,158.90 = 3,198.54 : x
  2. Step 2: Convert to fraction form
    5,187.81/7,158.90 = 3,198.54/x
  3. Step 3: Cross multiply
    5,187.81x = 7,158.90 × 3,198.54
  4. Step 4: Simplify right side
    5,187.81x = 22,898,028.01
  5. Step 5: Solve for x
    x = 22,898,028.01/5,187.81
  6. Step 6: Final answer
    x = 4,413.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.