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Finding the Fourth Proportional to 12,611.33, 18,916.83 and 4,297.15

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Solution

The fourth proportional to 12,611.33, 18,916.83 and 4,297.15 is: 6,445.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.33 : 18,916.83 = 4,297.15 : x
  2. Step 2: Convert to fraction form
    12,611.33/18,916.83 = 4,297.15/x
  3. Step 3: Cross multiply
    12,611.33x = 18,916.83 × 4,297.15
  4. Step 4: Simplify right side
    12,611.33x = 81,288,456.03
  5. Step 5: Solve for x
    x = 81,288,456.03/12,611.33
  6. Step 6: Final answer
    x = 6,445.67

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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.