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Finding the Fourth Proportional to 18,771.75, 25,905.02 and 10,388.79

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Solution

The fourth proportional to 18,771.75, 25,905.02 and 10,388.79 is: 14,336.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.75 : 25,905.02 = 10,388.79 : x
  2. Step 2: Convert to fraction form
    18,771.75/25,905.02 = 10,388.79/x
  3. Step 3: Cross multiply
    18,771.75x = 25,905.02 × 10,388.79
  4. Step 4: Simplify right side
    18,771.75x = 269,121,760.78
  5. Step 5: Solve for x
    x = 269,121,760.78/18,771.75
  6. Step 6: Final answer
    x = 14,336.53

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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.