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Finding the Fourth Proportional to 13,745.82, 18,969.89 and 8,080.89

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Solution

The fourth proportional to 13,745.82, 18,969.89 and 8,080.89 is: 11,152.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.82 : 18,969.89 = 8,080.89 : x
  2. Step 2: Convert to fraction form
    13,745.82/18,969.89 = 8,080.89/x
  3. Step 3: Cross multiply
    13,745.82x = 18,969.89 × 8,080.89
  4. Step 4: Simplify right side
    13,745.82x = 153,293,594.40
  5. Step 5: Solve for x
    x = 153,293,594.40/13,745.82
  6. Step 6: Final answer
    x = 11,152.02

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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.