Home / 8,121.88-12,181.47-2,277.28

Finding the Fourth Proportional to 8,121.88, 12,181.47 and 2,277.28

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Solution

The fourth proportional to 8,121.88, 12,181.47 and 2,277.28 is: 3,415.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.88 : 12,181.47 = 2,277.28 : x
  2. Step 2: Convert to fraction form
    8,121.88/12,181.47 = 2,277.28/x
  3. Step 3: Cross multiply
    8,121.88x = 12,181.47 × 2,277.28
  4. Step 4: Simplify right side
    8,121.88x = 27,740,618.00
  5. Step 5: Solve for x
    x = 27,740,618.00/8,121.88
  6. Step 6: Final answer
    x = 3,415.54

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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.