Home / 5,186.21-7,779.37-1,290.61

Finding the Fourth Proportional to 5,186.21, 7,779.37 and 1,290.61

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Solution

The fourth proportional to 5,186.21, 7,779.37 and 1,290.61 is: 1,935.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.21 : 7,779.37 = 1,290.61 : x
  2. Step 2: Convert to fraction form
    5,186.21/7,779.37 = 1,290.61/x
  3. Step 3: Cross multiply
    5,186.21x = 7,779.37 × 1,290.61
  4. Step 4: Simplify right side
    5,186.21x = 10,040,155.44
  5. Step 5: Solve for x
    x = 10,040,155.44/5,186.21
  6. Step 6: Final answer
    x = 1,935.93

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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.