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Finding the Fourth Proportional to 18,771.25, 25,910.10 and 10,818.78

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Solution

The fourth proportional to 18,771.25, 25,910.10 and 10,818.78 is: 14,933.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.25 : 25,910.10 = 10,818.78 : x
  2. Step 2: Convert to fraction form
    18,771.25/25,910.10 = 10,818.78/x
  3. Step 3: Cross multiply
    18,771.25x = 25,910.10 × 10,818.78
  4. Step 4: Simplify right side
    18,771.25x = 280,315,671.68
  5. Step 5: Solve for x
    x = 280,315,671.68/18,771.25
  6. Step 6: Final answer
    x = 14,933.24

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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.