Home / 7,980.83-11,968.20-2,642.79

Finding the Fourth Proportional to 7,980.83, 11,968.20 and 2,642.79

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Solution

The fourth proportional to 7,980.83, 11,968.20 and 2,642.79 is: 3,963.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.83 : 11,968.20 = 2,642.79 : x
  2. Step 2: Convert to fraction form
    7,980.83/11,968.20 = 2,642.79/x
  3. Step 3: Cross multiply
    7,980.83x = 11,968.20 × 2,642.79
  4. Step 4: Simplify right side
    7,980.83x = 31,629,439.28
  5. Step 5: Solve for x
    x = 31,629,439.28/7,980.83
  6. Step 6: Final answer
    x = 3,963.18

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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.