Home / 28,238.91-38,958.61-19,738.77

Finding the Fourth Proportional to 28,238.91, 38,958.61 and 19,738.77

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Solution

The fourth proportional to 28,238.91, 38,958.61 and 19,738.77 is: 27,231.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,238.91 : 38,958.61 = 19,738.77 : x
  2. Step 2: Convert to fraction form
    28,238.91/38,958.61 = 19,738.77/x
  3. Step 3: Cross multiply
    28,238.91x = 38,958.61 × 19,738.77
  4. Step 4: Simplify right side
    28,238.91x = 768,995,042.31
  5. Step 5: Solve for x
    x = 768,995,042.31/28,238.91
  6. Step 6: Final answer
    x = 27,231.75

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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.