Home / 18,939.06-28,418.34-8,416.32

Finding the Fourth Proportional to 18,939.06, 28,418.34 and 8,416.32

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Solution

The fourth proportional to 18,939.06, 28,418.34 and 8,416.32 is: 12,628.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.06 : 28,418.34 = 8,416.32 : x
  2. Step 2: Convert to fraction form
    18,939.06/28,418.34 = 8,416.32/x
  3. Step 3: Cross multiply
    18,939.06x = 28,418.34 × 8,416.32
  4. Step 4: Simplify right side
    18,939.06x = 239,177,843.31
  5. Step 5: Solve for x
    x = 239,177,843.31/18,939.06
  6. Step 6: Final answer
    x = 12,628.81

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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.