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Finding the Fourth Proportional to 18,843.96, 28,243.98 and 8,433.84

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Solution

The fourth proportional to 18,843.96, 28,243.98 and 8,433.84 is: 12,640.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.96 : 28,243.98 = 8,433.84 : x
  2. Step 2: Convert to fraction form
    18,843.96/28,243.98 = 8,433.84/x
  3. Step 3: Cross multiply
    18,843.96x = 28,243.98 × 8,433.84
  4. Step 4: Simplify right side
    18,843.96x = 238,205,208.28
  5. Step 5: Solve for x
    x = 238,205,208.28/18,843.96
  6. Step 6: Final answer
    x = 12,640.93

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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.