Home / 18,678.44-27,998.76-12,108.80

Finding the Fourth Proportional to 18,678.44, 27,998.76 and 12,108.80

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Solution

The fourth proportional to 18,678.44, 27,998.76 and 12,108.80 is: 18,150.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.44 : 27,998.76 = 12,108.80 : x
  2. Step 2: Convert to fraction form
    18,678.44/27,998.76 = 12,108.80/x
  3. Step 3: Cross multiply
    18,678.44x = 27,998.76 × 12,108.80
  4. Step 4: Simplify right side
    18,678.44x = 339,031,385.09
  5. Step 5: Solve for x
    x = 339,031,385.09/18,678.44
  6. Step 6: Final answer
    x = 18,150.95

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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.