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Finding the Fourth Proportional to 18,841.75, 28,262.63 and 7,754.47

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Solution

The fourth proportional to 18,841.75, 28,262.63 and 7,754.47 is: 11,631.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,841.75 : 28,262.63 = 7,754.47 : x
  2. Step 2: Convert to fraction form
    18,841.75/28,262.63 = 7,754.47/x
  3. Step 3: Cross multiply
    18,841.75x = 28,262.63 × 7,754.47
  4. Step 4: Simplify right side
    18,841.75x = 219,161,716.46
  5. Step 5: Solve for x
    x = 219,161,716.46/18,841.75
  6. Step 6: Final answer
    x = 11,631.71

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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.