Home / 28,173.78-38,879.48-15,426.82

Finding the Fourth Proportional to 28,173.78, 38,879.48 and 15,426.82

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Solution

The fourth proportional to 28,173.78, 38,879.48 and 15,426.82 is: 21,288.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.78 : 38,879.48 = 15,426.82 : x
  2. Step 2: Convert to fraction form
    28,173.78/38,879.48 = 15,426.82/x
  3. Step 3: Cross multiply
    28,173.78x = 38,879.48 × 15,426.82
  4. Step 4: Simplify right side
    28,173.78x = 599,786,739.65
  5. Step 5: Solve for x
    x = 599,786,739.65/28,173.78
  6. Step 6: Final answer
    x = 21,288.83

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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.