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Finding the Fourth Proportional to 13,751.52, 18,986.96 and 8,453.44

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Solution

The fourth proportional to 13,751.52, 18,986.96 and 8,453.44 is: 11,671.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.52 : 18,986.96 = 8,453.44 : x
  2. Step 2: Convert to fraction form
    13,751.52/18,986.96 = 8,453.44/x
  3. Step 3: Cross multiply
    13,751.52x = 18,986.96 × 8,453.44
  4. Step 4: Simplify right side
    13,751.52x = 160,505,127.14
  5. Step 5: Solve for x
    x = 160,505,127.14/13,751.52
  6. Step 6: Final answer
    x = 11,671.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.