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Finding the Fourth Proportional to 18,786.99, 28,192.78 and 7,100.21

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Solution

The fourth proportional to 18,786.99, 28,192.78 and 7,100.21 is: 10,654.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.99 : 28,192.78 = 7,100.21 : x
  2. Step 2: Convert to fraction form
    18,786.99/28,192.78 = 7,100.21/x
  3. Step 3: Cross multiply
    18,786.99x = 28,192.78 × 7,100.21
  4. Step 4: Simplify right side
    18,786.99x = 200,174,658.48
  5. Step 5: Solve for x
    x = 200,174,658.48/18,786.99
  6. Step 6: Final answer
    x = 10,654.96

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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.