Home / 20,855.54-28,780.73-11,295.54

Finding the Fourth Proportional to 20,855.54, 28,780.73 and 11,295.54

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Solution

The fourth proportional to 20,855.54, 28,780.73 and 11,295.54 is: 15,587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.54 : 28,780.73 = 11,295.54 : x
  2. Step 2: Convert to fraction form
    20,855.54/28,780.73 = 11,295.54/x
  3. Step 3: Cross multiply
    20,855.54x = 28,780.73 × 11,295.54
  4. Step 4: Simplify right side
    20,855.54x = 325,093,791.88
  5. Step 5: Solve for x
    x = 325,093,791.88/20,855.54
  6. Step 6: Final answer
    x = 15,587.89

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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.