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Finding the Fourth Proportional to 13,089.69, 18,067.74 and 8,900.37

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Solution

The fourth proportional to 13,089.69, 18,067.74 and 8,900.37 is: 12,285.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,089.69 : 18,067.74 = 8,900.37 : x
  2. Step 2: Convert to fraction form
    13,089.69/18,067.74 = 8,900.37/x
  3. Step 3: Cross multiply
    13,089.69x = 18,067.74 × 8,900.37
  4. Step 4: Simplify right side
    13,089.69x = 160,809,571.06
  5. Step 5: Solve for x
    x = 160,809,571.06/13,089.69
  6. Step 6: Final answer
    x = 12,285.21

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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.