Home / 12,912.60-19,372.20-4,147.60

Finding the Fourth Proportional to 12,912.60, 19,372.20 and 4,147.60

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Solution

The fourth proportional to 12,912.60, 19,372.20 and 4,147.60 is: 6,222.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.60 : 19,372.20 = 4,147.60 : x
  2. Step 2: Convert to fraction form
    12,912.60/19,372.20 = 4,147.60/x
  3. Step 3: Cross multiply
    12,912.60x = 19,372.20 × 4,147.60
  4. Step 4: Simplify right side
    12,912.60x = 80,348,136.72
  5. Step 5: Solve for x
    x = 80,348,136.72/12,912.60
  6. Step 6: Final answer
    x = 6,222.46

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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.