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Finding the Fourth Proportional to 18,782.79, 25,912.74 and 11,226.33

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Solution

The fourth proportional to 18,782.79, 25,912.74 and 11,226.33 is: 15,487.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.79 : 25,912.74 = 11,226.33 : x
  2. Step 2: Convert to fraction form
    18,782.79/25,912.74 = 11,226.33/x
  3. Step 3: Cross multiply
    18,782.79x = 25,912.74 × 11,226.33
  4. Step 4: Simplify right side
    18,782.79x = 290,905,012.54
  5. Step 5: Solve for x
    x = 290,905,012.54/18,782.79
  6. Step 6: Final answer
    x = 15,487.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.