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Finding the Fourth Proportional to 28,813.03, 39,738.93 and 19,858.48

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Solution

The fourth proportional to 28,813.03, 39,738.93 and 19,858.48 is: 27,388.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,813.03 : 39,738.93 = 19,858.48 : x
  2. Step 2: Convert to fraction form
    28,813.03/39,738.93 = 19,858.48/x
  3. Step 3: Cross multiply
    28,813.03x = 39,738.93 × 19,858.48
  4. Step 4: Simplify right side
    28,813.03x = 789,154,746.63
  5. Step 5: Solve for x
    x = 789,154,746.63/28,813.03
  6. Step 6: Final answer
    x = 27,388.81

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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.