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Finding the Fourth Proportional to 18,996.96, 28,491.36 and 7,308

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Solution

The fourth proportional to 18,996.96, 28,491.36 and 7,308 is: 10,960.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,996.96 : 28,491.36 = 7,308 : x
  2. Step 2: Convert to fraction form
    18,996.96/28,491.36 = 7,308/x
  3. Step 3: Cross multiply
    18,996.96x = 28,491.36 × 7,308
  4. Step 4: Simplify right side
    18,996.96x = 208,214,858.88
  5. Step 5: Solve for x
    x = 208,214,858.88/18,996.96
  6. Step 6: Final answer
    x = 10,960.43

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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.