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Finding the Fourth Proportional to 28,409, 39,163.43 and 19,884.74

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Solution

The fourth proportional to 28,409, 39,163.43 and 19,884.74 is: 27,412.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,409 : 39,163.43 = 19,884.74 : x
  2. Step 2: Convert to fraction form
    28,409/39,163.43 = 19,884.74/x
  3. Step 3: Cross multiply
    28,409x = 39,163.43 × 19,884.74
  4. Step 4: Simplify right side
    28,409x = 778,754,623.06
  5. Step 5: Solve for x
    x = 778,754,623.06/28,409
  6. Step 6: Final answer
    x = 27,412.25

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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.