Home / 28,536.99-39,382.22-15,789.96

Finding the Fourth Proportional to 28,536.99, 39,382.22 and 15,789.96

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Solution

The fourth proportional to 28,536.99, 39,382.22 and 15,789.96 is: 21,790.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,536.99 : 39,382.22 = 15,789.96 : x
  2. Step 2: Convert to fraction form
    28,536.99/39,382.22 = 15,789.96/x
  3. Step 3: Cross multiply
    28,536.99x = 39,382.22 × 15,789.96
  4. Step 4: Simplify right side
    28,536.99x = 621,843,599.56
  5. Step 5: Solve for x
    x = 621,843,599.56/28,536.99
  6. Step 6: Final answer
    x = 21,790.79

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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.