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Finding the Fourth Proportional to 19,021.93, 28,524.23 and 7,921.99

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Solution

The fourth proportional to 19,021.93, 28,524.23 and 7,921.99 is: 11,879.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,021.93 : 28,524.23 = 7,921.99 : x
  2. Step 2: Convert to fraction form
    19,021.93/28,524.23 = 7,921.99/x
  3. Step 3: Cross multiply
    19,021.93x = 28,524.23 × 7,921.99
  4. Step 4: Simplify right side
    19,021.93x = 225,968,664.82
  5. Step 5: Solve for x
    x = 225,968,664.82/19,021.93
  6. Step 6: Final answer
    x = 11,879.38

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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.