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Finding the Fourth Proportional to 7,974.45, 12,021.41 and 7,439.24

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Solution

The fourth proportional to 7,974.45, 12,021.41 and 7,439.24 is: 11,214.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,974.45 : 12,021.41 = 7,439.24 : x
  2. Step 2: Convert to fraction form
    7,974.45/12,021.41 = 7,439.24/x
  3. Step 3: Cross multiply
    7,974.45x = 12,021.41 × 7,439.24
  4. Step 4: Simplify right side
    7,974.45x = 89,430,202.78
  5. Step 5: Solve for x
    x = 89,430,202.78/7,974.45
  6. Step 6: Final answer
    x = 11,214.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.