Home / 7,912.25-11,864.80-2,978.39

Finding the Fourth Proportional to 7,912.25, 11,864.80 and 2,978.39

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Solution

The fourth proportional to 7,912.25, 11,864.80 and 2,978.39 is: 4,466.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.25 : 11,864.80 = 2,978.39 : x
  2. Step 2: Convert to fraction form
    7,912.25/11,864.80 = 2,978.39/x
  3. Step 3: Cross multiply
    7,912.25x = 11,864.80 × 2,978.39
  4. Step 4: Simplify right side
    7,912.25x = 35,337,951.56
  5. Step 5: Solve for x
    x = 35,337,951.56/7,912.25
  6. Step 6: Final answer
    x = 4,466.23

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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.