Home / 7,978.39-11,949.36-3,821.32

Finding the Fourth Proportional to 7,978.39, 11,949.36 and 3,821.32

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Solution

The fourth proportional to 7,978.39, 11,949.36 and 3,821.32 is: 5,723.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.39 : 11,949.36 = 3,821.32 : x
  2. Step 2: Convert to fraction form
    7,978.39/11,949.36 = 3,821.32/x
  3. Step 3: Cross multiply
    7,978.39x = 11,949.36 × 3,821.32
  4. Step 4: Simplify right side
    7,978.39x = 45,662,328.36
  5. Step 5: Solve for x
    x = 45,662,328.36/7,978.39
  6. Step 6: Final answer
    x = 5,723.25

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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.