Home / 7,912.89-11,865.96-2,979.09

Finding the Fourth Proportional to 7,912.89, 11,865.96 and 2,979.09

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Solution

The fourth proportional to 7,912.89, 11,865.96 and 2,979.09 is: 4,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.89 : 11,865.96 = 2,979.09 : x
  2. Step 2: Convert to fraction form
    7,912.89/11,865.96 = 2,979.09/x
  3. Step 3: Cross multiply
    7,912.89x = 11,865.96 × 2,979.09
  4. Step 4: Simplify right side
    7,912.89x = 35,349,762.78
  5. Step 5: Solve for x
    x = 35,349,762.78/7,912.89
  6. Step 6: Final answer
    x = 4,467.36

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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.