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Finding the Fourth Proportional to 18,361.25, 25,340.69 and 10,909.25

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Solution

The fourth proportional to 18,361.25, 25,340.69 and 10,909.25 is: 15,056.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.25 : 25,340.69 = 10,909.25 : x
  2. Step 2: Convert to fraction form
    18,361.25/25,340.69 = 10,909.25/x
  3. Step 3: Cross multiply
    18,361.25x = 25,340.69 × 10,909.25
  4. Step 4: Simplify right side
    18,361.25x = 276,447,867.84
  5. Step 5: Solve for x
    x = 276,447,867.84/18,361.25
  6. Step 6: Final answer
    x = 15,056.05

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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.