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Finding the Fourth Proportional to 18,843.86, 28,239.02 and 13,874.50

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Solution

The fourth proportional to 18,843.86, 28,239.02 and 13,874.50 is: 20,792.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.86 : 28,239.02 = 13,874.50 : x
  2. Step 2: Convert to fraction form
    18,843.86/28,239.02 = 13,874.50/x
  3. Step 3: Cross multiply
    18,843.86x = 28,239.02 × 13,874.50
  4. Step 4: Simplify right side
    18,843.86x = 391,802,282.99
  5. Step 5: Solve for x
    x = 391,802,282.99/18,843.86
  6. Step 6: Final answer
    x = 20,792.04

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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.