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Finding the Fourth Proportional to 11,907.87, 17,861.62 and 2,902.09

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Solution

The fourth proportional to 11,907.87, 17,861.62 and 2,902.09 is: 4,353.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,907.87 : 17,861.62 = 2,902.09 : x
  2. Step 2: Convert to fraction form
    11,907.87/17,861.62 = 2,902.09/x
  3. Step 3: Cross multiply
    11,907.87x = 17,861.62 × 2,902.09
  4. Step 4: Simplify right side
    11,907.87x = 51,835,924.97
  5. Step 5: Solve for x
    x = 51,835,924.97/11,907.87
  6. Step 6: Final answer
    x = 4,353.08

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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.