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Finding the Fourth Proportional to 18,990.70, 28,485 and 5,841.37

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Solution

The fourth proportional to 18,990.70, 28,485 and 5,841.37 is: 8,761.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.70 : 28,485 = 5,841.37 : x
  2. Step 2: Convert to fraction form
    18,990.70/28,485 = 5,841.37/x
  3. Step 3: Cross multiply
    18,990.70x = 28,485 × 5,841.37
  4. Step 4: Simplify right side
    18,990.70x = 166,391,424.45
  5. Step 5: Solve for x
    x = 166,391,424.45/18,990.70
  6. Step 6: Final answer
    x = 8,761.73

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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.