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Finding the Fourth Proportional to 11,790.87, 17,688.90 and 3,895.80

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Solution

The fourth proportional to 11,790.87, 17,688.90 and 3,895.80 is: 5,844.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,790.87 : 17,688.90 = 3,895.80 : x
  2. Step 2: Convert to fraction form
    11,790.87/17,688.90 = 3,895.80/x
  3. Step 3: Cross multiply
    11,790.87x = 17,688.90 × 3,895.80
  4. Step 4: Simplify right side
    11,790.87x = 68,912,416.62
  5. Step 5: Solve for x
    x = 68,912,416.62/11,790.87
  6. Step 6: Final answer
    x = 5,844.56

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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.