Home / 7,978.04-11,971.86-2,787.56

Finding the Fourth Proportional to 7,978.04, 11,971.86 and 2,787.56

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Solution

The fourth proportional to 7,978.04, 11,971.86 and 2,787.56 is: 4,183.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.04 : 11,971.86 = 2,787.56 : x
  2. Step 2: Convert to fraction form
    7,978.04/11,971.86 = 2,787.56/x
  3. Step 3: Cross multiply
    7,978.04x = 11,971.86 × 2,787.56
  4. Step 4: Simplify right side
    7,978.04x = 33,372,278.06
  5. Step 5: Solve for x
    x = 33,372,278.06/7,978.04
  6. Step 6: Final answer
    x = 4,183.02

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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.