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Finding the Fourth Proportional to 18,922.30, 25,923.69 and 18,212.90

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Solution

The fourth proportional to 18,922.30, 25,923.69 and 18,212.90 is: 24,951.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.30 : 25,923.69 = 18,212.90 : x
  2. Step 2: Convert to fraction form
    18,922.30/25,923.69 = 18,212.90/x
  3. Step 3: Cross multiply
    18,922.30x = 25,923.69 × 18,212.90
  4. Step 4: Simplify right side
    18,922.30x = 472,145,573.60
  5. Step 5: Solve for x
    x = 472,145,573.60/18,922.30
  6. Step 6: Final answer
    x = 24,951.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.