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Finding the Fourth Proportional to 8,942.70, 13,435.72 and 7,892.94

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Solution

The fourth proportional to 8,942.70, 13,435.72 and 7,892.94 is: 11,858.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,942.70 : 13,435.72 = 7,892.94 : x
  2. Step 2: Convert to fraction form
    8,942.70/13,435.72 = 7,892.94/x
  3. Step 3: Cross multiply
    8,942.70x = 13,435.72 × 7,892.94
  4. Step 4: Simplify right side
    8,942.70x = 106,047,406.87
  5. Step 5: Solve for x
    x = 106,047,406.87/8,942.70
  6. Step 6: Final answer
    x = 11,858.54

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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.