Home / 12,679.12-19,020.74-3,912

Finding the Fourth Proportional to 12,679.12, 19,020.74 and 3,912

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Solution

The fourth proportional to 12,679.12, 19,020.74 and 3,912 is: 5,868.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.12 : 19,020.74 = 3,912 : x
  2. Step 2: Convert to fraction form
    12,679.12/19,020.74 = 3,912/x
  3. Step 3: Cross multiply
    12,679.12x = 19,020.74 × 3,912
  4. Step 4: Simplify right side
    12,679.12x = 74,409,134.88
  5. Step 5: Solve for x
    x = 74,409,134.88/12,679.12
  6. Step 6: Final answer
    x = 5,868.64

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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.