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Finding the Fourth Proportional to 18,883.86, 28,333.47 and 12,137

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Solution

The fourth proportional to 18,883.86, 28,333.47 and 12,137 is: 18,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,883.86 : 28,333.47 = 12,137 : x
  2. Step 2: Convert to fraction form
    18,883.86/28,333.47 = 12,137/x
  3. Step 3: Cross multiply
    18,883.86x = 28,333.47 × 12,137
  4. Step 4: Simplify right side
    18,883.86x = 343,883,325.39
  5. Step 5: Solve for x
    x = 343,883,325.39/18,883.86
  6. Step 6: Final answer
    x = 18,210.44

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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.