Home / 20,383.05-28,127.39-11,428.77

Finding the Fourth Proportional to 20,383.05, 28,127.39 and 11,428.77

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Solution

The fourth proportional to 20,383.05, 28,127.39 and 11,428.77 is: 15,771.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.05 : 28,127.39 = 11,428.77 : x
  2. Step 2: Convert to fraction form
    20,383.05/28,127.39 = 11,428.77/x
  3. Step 3: Cross multiply
    20,383.05x = 28,127.39 × 11,428.77
  4. Step 4: Simplify right side
    20,383.05x = 321,461,413.87
  5. Step 5: Solve for x
    x = 321,461,413.87/20,383.05
  6. Step 6: Final answer
    x = 15,771.02

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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.