Home / 28,821.78-39,789.09-20,458.26

Finding the Fourth Proportional to 28,821.78, 39,789.09 and 20,458.26

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Solution

The fourth proportional to 28,821.78, 39,789.09 and 20,458.26 is: 28,243.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,821.78 : 39,789.09 = 20,458.26 : x
  2. Step 2: Convert to fraction form
    28,821.78/39,789.09 = 20,458.26/x
  3. Step 3: Cross multiply
    28,821.78x = 39,789.09 × 20,458.26
  4. Step 4: Simplify right side
    28,821.78x = 814,015,548.38
  5. Step 5: Solve for x
    x = 814,015,548.38/28,821.78
  6. Step 6: Final answer
    x = 28,243.07

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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.