Home / 12,138.27-18,194.44-8,664.99

Finding the Fourth Proportional to 12,138.27, 18,194.44 and 8,664.99

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Solution

The fourth proportional to 12,138.27, 18,194.44 and 8,664.99 is: 12,988.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.27 : 18,194.44 = 8,664.99 : x
  2. Step 2: Convert to fraction form
    12,138.27/18,194.44 = 8,664.99/x
  3. Step 3: Cross multiply
    12,138.27x = 18,194.44 × 8,664.99
  4. Step 4: Simplify right side
    12,138.27x = 157,654,640.66
  5. Step 5: Solve for x
    x = 157,654,640.66/12,138.27
  6. Step 6: Final answer
    x = 12,988.23

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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.