Home / 7,986.54-11,979.95-2,649.75

Finding the Fourth Proportional to 7,986.54, 11,979.95 and 2,649.75

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Solution

The fourth proportional to 7,986.54, 11,979.95 and 2,649.75 is: 3,974.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.54 : 11,979.95 = 2,649.75 : x
  2. Step 2: Convert to fraction form
    7,986.54/11,979.95 = 2,649.75/x
  3. Step 3: Cross multiply
    7,986.54x = 11,979.95 × 2,649.75
  4. Step 4: Simplify right side
    7,986.54x = 31,743,872.51
  5. Step 5: Solve for x
    x = 31,743,872.51/7,986.54
  6. Step 6: Final answer
    x = 3,974.67

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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.