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Finding the Fourth Proportional to 17,002.80, 25,453.80 and 12,639.60

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Solution

The fourth proportional to 17,002.80, 25,453.80 and 12,639.60 is: 18,921.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,002.80 : 25,453.80 = 12,639.60 : x
  2. Step 2: Convert to fraction form
    17,002.80/25,453.80 = 12,639.60/x
  3. Step 3: Cross multiply
    17,002.80x = 25,453.80 × 12,639.60
  4. Step 4: Simplify right side
    17,002.80x = 321,725,850.48
  5. Step 5: Solve for x
    x = 321,725,850.48/17,002.80
  6. Step 6: Final answer
    x = 18,921.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.