Home / 11,986.22-17,980.41-3,220.94

Finding the Fourth Proportional to 11,986.22, 17,980.41 and 3,220.94

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Solution

The fourth proportional to 11,986.22, 17,980.41 and 3,220.94 is: 4,831.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.22 : 17,980.41 = 3,220.94 : x
  2. Step 2: Convert to fraction form
    11,986.22/17,980.41 = 3,220.94/x
  3. Step 3: Cross multiply
    11,986.22x = 17,980.41 × 3,220.94
  4. Step 4: Simplify right side
    11,986.22x = 57,913,821.79
  5. Step 5: Solve for x
    x = 57,913,821.79/11,986.22
  6. Step 6: Final answer
    x = 4,831.70

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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.