Home / 28,519.45-39,357.09-15,771.97

Finding the Fourth Proportional to 28,519.45, 39,357.09 and 15,771.97

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Solution

The fourth proportional to 28,519.45, 39,357.09 and 15,771.97 is: 21,765.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.45 : 39,357.09 = 15,771.97 : x
  2. Step 2: Convert to fraction form
    28,519.45/39,357.09 = 15,771.97/x
  3. Step 3: Cross multiply
    28,519.45x = 39,357.09 × 15,771.97
  4. Step 4: Simplify right side
    28,519.45x = 620,738,842.77
  5. Step 5: Solve for x
    x = 620,738,842.77/28,519.45
  6. Step 6: Final answer
    x = 21,765.46

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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.