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Finding the Fourth Proportional to 18,653.75, 27,990.34 and 8,263.07

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Solution

The fourth proportional to 18,653.75, 27,990.34 and 8,263.07 is: 12,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.75 : 27,990.34 = 8,263.07 : x
  2. Step 2: Convert to fraction form
    18,653.75/27,990.34 = 8,263.07/x
  3. Step 3: Cross multiply
    18,653.75x = 27,990.34 × 8,263.07
  4. Step 4: Simplify right side
    18,653.75x = 231,285,957.48
  5. Step 5: Solve for x
    x = 231,285,957.48/18,653.75
  6. Step 6: Final answer
    x = 12,398.90

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1.5x scale

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.