Home / 28,367.75-39,147.15-15,620.66

Finding the Fourth Proportional to 28,367.75, 39,147.15 and 15,620.66

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Solution

The fourth proportional to 28,367.75, 39,147.15 and 15,620.66 is: 21,556.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,367.75 : 39,147.15 = 15,620.66 : x
  2. Step 2: Convert to fraction form
    28,367.75/39,147.15 = 15,620.66/x
  3. Step 3: Cross multiply
    28,367.75x = 39,147.15 × 15,620.66
  4. Step 4: Simplify right side
    28,367.75x = 611,504,462.10
  5. Step 5: Solve for x
    x = 611,504,462.10/28,367.75
  6. Step 6: Final answer
    x = 21,556.32

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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.