Home / 12,912.75-19,372.37-3,678.75

Finding the Fourth Proportional to 12,912.75, 19,372.37 and 3,678.75

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Solution

The fourth proportional to 12,912.75, 19,372.37 and 3,678.75 is: 5,519.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.75 : 19,372.37 = 3,678.75 : x
  2. Step 2: Convert to fraction form
    12,912.75/19,372.37 = 3,678.75/x
  3. Step 3: Cross multiply
    12,912.75x = 19,372.37 × 3,678.75
  4. Step 4: Simplify right side
    12,912.75x = 71,266,087.74
  5. Step 5: Solve for x
    x = 71,266,087.74/12,912.75
  6. Step 6: Final answer
    x = 5,519.05

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1.5x scale

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.