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Finding the Fourth Proportional to 30,418.20, 41,953.02 and 18,481.20

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Solution

The fourth proportional to 30,418.20, 41,953.02 and 18,481.20 is: 25,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,418.20 : 41,953.02 = 18,481.20 : x
  2. Step 2: Convert to fraction form
    30,418.20/41,953.02 = 18,481.20/x
  3. Step 3: Cross multiply
    30,418.20x = 41,953.02 × 18,481.20
  4. Step 4: Simplify right side
    30,418.20x = 775,342,153.22
  5. Step 5: Solve for x
    x = 775,342,153.22/30,418.20
  6. Step 6: Final answer
    x = 25,489.42

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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.