Home / 19,086.03-28,640.21-7,991.78

Finding the Fourth Proportional to 19,086.03, 28,640.21 and 7,991.78

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Solution

The fourth proportional to 19,086.03, 28,640.21 and 7,991.78 is: 11,992.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,086.03 : 28,640.21 = 7,991.78 : x
  2. Step 2: Convert to fraction form
    19,086.03/28,640.21 = 7,991.78/x
  3. Step 3: Cross multiply
    19,086.03x = 28,640.21 × 7,991.78
  4. Step 4: Simplify right side
    19,086.03x = 228,886,074.31
  5. Step 5: Solve for x
    x = 228,886,074.31/19,086.03
  6. Step 6: Final answer
    x = 11,992.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.