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Finding the Fourth Proportional to 18,883.70, 28,326.18 and 5,736.05

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Solution

The fourth proportional to 18,883.70, 28,326.18 and 5,736.05 is: 8,604.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,883.70 : 28,326.18 = 5,736.05 : x
  2. Step 2: Convert to fraction form
    18,883.70/28,326.18 = 5,736.05/x
  3. Step 3: Cross multiply
    18,883.70x = 28,326.18 × 5,736.05
  4. Step 4: Simplify right side
    18,883.70x = 162,480,243.16
  5. Step 5: Solve for x
    x = 162,480,243.16/18,883.70
  6. Step 6: Final answer
    x = 8,604.26

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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.