Home / 8,278.88-12,418.31-2,122.88

Finding the Fourth Proportional to 8,278.88, 12,418.31 and 2,122.88

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Solution

The fourth proportional to 8,278.88, 12,418.31 and 2,122.88 is: 3,184.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,278.88 : 12,418.31 = 2,122.88 : x
  2. Step 2: Convert to fraction form
    8,278.88/12,418.31 = 2,122.88/x
  3. Step 3: Cross multiply
    8,278.88x = 12,418.31 × 2,122.88
  4. Step 4: Simplify right side
    8,278.88x = 26,362,525.15
  5. Step 5: Solve for x
    x = 26,362,525.15/8,278.88
  6. Step 6: Final answer
    x = 3,184.31

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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.