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Finding the Fourth Proportional to 13,977.91, 20,955.83 and 6,954.09

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Solution

The fourth proportional to 13,977.91, 20,955.83 and 6,954.09 is: 10,425.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.91 : 20,955.83 = 6,954.09 : x
  2. Step 2: Convert to fraction form
    13,977.91/20,955.83 = 6,954.09/x
  3. Step 3: Cross multiply
    13,977.91x = 20,955.83 × 6,954.09
  4. Step 4: Simplify right side
    13,977.91x = 145,728,653.61
  5. Step 5: Solve for x
    x = 145,728,653.61/13,977.91
  6. Step 6: Final answer
    x = 10,425.64

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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.