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Finding the Fourth Proportional to 18,855.86, 28,142.69 and 18,544.49

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Solution

The fourth proportional to 18,855.86, 28,142.69 and 18,544.49 is: 27,677.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.86 : 28,142.69 = 18,544.49 : x
  2. Step 2: Convert to fraction form
    18,855.86/28,142.69 = 18,544.49/x
  3. Step 3: Cross multiply
    18,855.86x = 28,142.69 × 18,544.49
  4. Step 4: Simplify right side
    18,855.86x = 521,891,738.93
  5. Step 5: Solve for x
    x = 521,891,738.93/18,855.86
  6. Step 6: Final answer
    x = 27,677.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.