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Finding the Fourth Proportional to 13,800.97, 20,698.42 and 3,940.03

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Solution

The fourth proportional to 13,800.97, 20,698.42 and 3,940.03 is: 5,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.97 : 20,698.42 = 3,940.03 : x
  2. Step 2: Convert to fraction form
    13,800.97/20,698.42 = 3,940.03/x
  3. Step 3: Cross multiply
    13,800.97x = 20,698.42 × 3,940.03
  4. Step 4: Simplify right side
    13,800.97x = 81,552,395.75
  5. Step 5: Solve for x
    x = 81,552,395.75/13,800.97
  6. Step 6: Final answer
    x = 5,909.18

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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.