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Finding the Fourth Proportional to 18,879.70, 26,053.41 and 10,381.78

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Solution

The fourth proportional to 18,879.70, 26,053.41 and 10,381.78 is: 14,326.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.70 : 26,053.41 = 10,381.78 : x
  2. Step 2: Convert to fraction form
    18,879.70/26,053.41 = 10,381.78/x
  3. Step 3: Cross multiply
    18,879.70x = 26,053.41 × 10,381.78
  4. Step 4: Simplify right side
    18,879.70x = 270,480,770.87
  5. Step 5: Solve for x
    x = 270,480,770.87/18,879.70
  6. Step 6: Final answer
    x = 14,326.54

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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.