Home / 7,986.80-11,985.66-2,792.68

Finding the Fourth Proportional to 7,986.80, 11,985.66 and 2,792.68

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Solution

The fourth proportional to 7,986.80, 11,985.66 and 2,792.68 is: 4,190.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.80 : 11,985.66 = 2,792.68 : x
  2. Step 2: Convert to fraction form
    7,986.80/11,985.66 = 2,792.68/x
  3. Step 3: Cross multiply
    7,986.80x = 11,985.66 × 2,792.68
  4. Step 4: Simplify right side
    7,986.80x = 33,472,112.97
  5. Step 5: Solve for x
    x = 33,472,112.97/7,986.80
  6. Step 6: Final answer
    x = 4,190.93

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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.