Home / 12,611.28-18,919.23-5,211.73

Finding the Fourth Proportional to 12,611.28, 18,919.23 and 5,211.73

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Solution

The fourth proportional to 12,611.28, 18,919.23 and 5,211.73 is: 7,818.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.28 : 18,919.23 = 5,211.73 : x
  2. Step 2: Convert to fraction form
    12,611.28/18,919.23 = 5,211.73/x
  3. Step 3: Cross multiply
    12,611.28x = 18,919.23 × 5,211.73
  4. Step 4: Simplify right side
    12,611.28x = 98,601,851.73
  5. Step 5: Solve for x
    x = 98,601,851.73/12,611.28
  6. Step 6: Final answer
    x = 7,818.54

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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.