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Finding the Fourth Proportional to 18,738.25, 25,880.04 and 12,759.54

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Solution

The fourth proportional to 18,738.25, 25,880.04 and 12,759.54 is: 17,622.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738.25 : 25,880.04 = 12,759.54 : x
  2. Step 2: Convert to fraction form
    18,738.25/25,880.04 = 12,759.54/x
  3. Step 3: Cross multiply
    18,738.25x = 25,880.04 × 12,759.54
  4. Step 4: Simplify right side
    18,738.25x = 330,217,308.53
  5. Step 5: Solve for x
    x = 330,217,308.53/18,738.25
  6. Step 6: Final answer
    x = 17,622.64

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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.