Home / 28,318.42-39,021.83-21,906.07

Finding the Fourth Proportional to 28,318.42, 39,021.83 and 21,906.07

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Solution

The fourth proportional to 28,318.42, 39,021.83 and 21,906.07 is: 30,185.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.42 : 39,021.83 = 21,906.07 : x
  2. Step 2: Convert to fraction form
    28,318.42/39,021.83 = 21,906.07/x
  3. Step 3: Cross multiply
    28,318.42x = 39,021.83 × 21,906.07
  4. Step 4: Simplify right side
    28,318.42x = 854,814,744.40
  5. Step 5: Solve for x
    x = 854,814,744.40/28,318.42
  6. Step 6: Final answer
    x = 30,185.83

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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.