Home / 13,623.73-18,802.79-8,321.61

Finding the Fourth Proportional to 13,623.73, 18,802.79 and 8,321.61

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Solution

The fourth proportional to 13,623.73, 18,802.79 and 8,321.61 is: 11,485.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.73 : 18,802.79 = 8,321.61 : x
  2. Step 2: Convert to fraction form
    13,623.73/18,802.79 = 8,321.61/x
  3. Step 3: Cross multiply
    13,623.73x = 18,802.79 × 8,321.61
  4. Step 4: Simplify right side
    13,623.73x = 156,469,443.68
  5. Step 5: Solve for x
    x = 156,469,443.68/13,623.73
  6. Step 6: Final answer
    x = 11,485.07

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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.