Home / 12,912.44-19,371.90-4,147.16

Finding the Fourth Proportional to 12,912.44, 19,371.90 and 4,147.16

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Solution

The fourth proportional to 12,912.44, 19,371.90 and 4,147.16 is: 6,221.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.44 : 19,371.90 = 4,147.16 : x
  2. Step 2: Convert to fraction form
    12,912.44/19,371.90 = 4,147.16/x
  3. Step 3: Cross multiply
    12,912.44x = 19,371.90 × 4,147.16
  4. Step 4: Simplify right side
    12,912.44x = 80,338,368.80
  5. Step 5: Solve for x
    x = 80,338,368.80/12,912.44
  6. Step 6: Final answer
    x = 6,221.78

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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.