Home / 28,850.78-39,816.01-20,355.81

Finding the Fourth Proportional to 28,850.78, 39,816.01 and 20,355.81

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Solution

The fourth proportional to 28,850.78, 39,816.01 and 20,355.81 is: 28,092.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,850.78 : 39,816.01 = 20,355.81 : x
  2. Step 2: Convert to fraction form
    28,850.78/39,816.01 = 20,355.81/x
  3. Step 3: Cross multiply
    28,850.78x = 39,816.01 × 20,355.81
  4. Step 4: Simplify right side
    28,850.78x = 810,486,896.15
  5. Step 5: Solve for x
    x = 810,486,896.15/28,850.78
  6. Step 6: Final answer
    x = 28,092.37

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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.