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Finding the Fourth Proportional to 13,340.88, 18,410.78 and 7,372.92

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Solution

The fourth proportional to 13,340.88, 18,410.78 and 7,372.92 is: 10,174.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,340.88 : 18,410.78 = 7,372.92 : x
  2. Step 2: Convert to fraction form
    13,340.88/18,410.78 = 7,372.92/x
  3. Step 3: Cross multiply
    13,340.88x = 18,410.78 × 7,372.92
  4. Step 4: Simplify right side
    13,340.88x = 135,741,208.08
  5. Step 5: Solve for x
    x = 135,741,208.08/13,340.88
  6. Step 6: Final answer
    x = 10,174.83

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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.