Home / 39,025.89-53,855.82-21,121.09

Finding the Fourth Proportional to 39,025.89, 53,855.82 and 21,121.09

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Solution

The fourth proportional to 39,025.89, 53,855.82 and 21,121.09 is: 29,147.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,025.89 : 53,855.82 = 21,121.09 : x
  2. Step 2: Convert to fraction form
    39,025.89/53,855.82 = 21,121.09/x
  3. Step 3: Cross multiply
    39,025.89x = 53,855.82 × 21,121.09
  4. Step 4: Simplify right side
    39,025.89x = 1,137,493,486.60
  5. Step 5: Solve for x
    x = 1,137,493,486.60/39,025.89
  6. Step 6: Final answer
    x = 29,147.15

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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.