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Finding the Fourth Proportional to 18,841.42, 28,262.31 and 4,990.42

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Solution

The fourth proportional to 18,841.42, 28,262.31 and 4,990.42 is: 7,485.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,841.42 : 28,262.31 = 4,990.42 : x
  2. Step 2: Convert to fraction form
    18,841.42/28,262.31 = 4,990.42/x
  3. Step 3: Cross multiply
    18,841.42x = 28,262.31 × 4,990.42
  4. Step 4: Simplify right side
    18,841.42x = 141,040,797.07
  5. Step 5: Solve for x
    x = 141,040,797.07/18,841.42
  6. Step 6: Final answer
    x = 7,485.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.