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Finding the Fourth Proportional to 7,863.78, 11,795.67 and 2,020.40

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Solution

The fourth proportional to 7,863.78, 11,795.67 and 2,020.40 is: 3,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,863.78 : 11,795.67 = 2,020.40 : x
  2. Step 2: Convert to fraction form
    7,863.78/11,795.67 = 2,020.40/x
  3. Step 3: Cross multiply
    7,863.78x = 11,795.67 × 2,020.40
  4. Step 4: Simplify right side
    7,863.78x = 23,831,912.69
  5. Step 5: Solve for x
    x = 23,831,912.69/7,863.78
  6. Step 6: Final answer
    x = 3,030.59

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Similar ratio
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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.