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Finding the Fourth Proportional to 25,474.35, 35,154.72 and 15,919.79

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Solution

The fourth proportional to 25,474.35, 35,154.72 and 15,919.79 is: 21,969.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,474.35 : 35,154.72 = 15,919.79 : x
  2. Step 2: Convert to fraction form
    25,474.35/35,154.72 = 15,919.79/x
  3. Step 3: Cross multiply
    25,474.35x = 35,154.72 × 15,919.79
  4. Step 4: Simplify right side
    25,474.35x = 559,655,584.14
  5. Step 5: Solve for x
    x = 559,655,584.14/25,474.35
  6. Step 6: Final answer
    x = 21,969.38

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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.