Home / 28,383.75-39,169.23-15,636.68

Finding the Fourth Proportional to 28,383.75, 39,169.23 and 15,636.68

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Solution

The fourth proportional to 28,383.75, 39,169.23 and 15,636.68 is: 21,578.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,383.75 : 39,169.23 = 15,636.68 : x
  2. Step 2: Convert to fraction form
    28,383.75/39,169.23 = 15,636.68/x
  3. Step 3: Cross multiply
    28,383.75x = 39,169.23 × 15,636.68
  4. Step 4: Simplify right side
    28,383.75x = 612,476,715.36
  5. Step 5: Solve for x
    x = 612,476,715.36/28,383.75
  6. Step 6: Final answer
    x = 21,578.43

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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.