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Finding the Fourth Proportional to 18,021.80, 27,000.30 and 16,855.40

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Solution

The fourth proportional to 18,021.80, 27,000.30 and 16,855.40 is: 25,252.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.80 : 27,000.30 = 16,855.40 : x
  2. Step 2: Convert to fraction form
    18,021.80/27,000.30 = 16,855.40/x
  3. Step 3: Cross multiply
    18,021.80x = 27,000.30 × 16,855.40
  4. Step 4: Simplify right side
    18,021.80x = 455,100,856.62
  5. Step 5: Solve for x
    x = 455,100,856.62/18,021.80
  6. Step 6: Final answer
    x = 25,252.80

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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.