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Finding the Fourth Proportional to 13,375.98, 20,070.80 and 8,936.68

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Solution

The fourth proportional to 13,375.98, 20,070.80 and 8,936.68 is: 13,409.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.98 : 20,070.80 = 8,936.68 : x
  2. Step 2: Convert to fraction form
    13,375.98/20,070.80 = 8,936.68/x
  3. Step 3: Cross multiply
    13,375.98x = 20,070.80 × 8,936.68
  4. Step 4: Simplify right side
    13,375.98x = 179,366,316.94
  5. Step 5: Solve for x
    x = 179,366,316.94/13,375.98
  6. Step 6: Final answer
    x = 13,409.58

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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.