Home / 13,727.82-18,933.12-8,418.90

Finding the Fourth Proportional to 13,727.82, 18,933.12 and 8,418.90

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Solution

The fourth proportional to 13,727.82, 18,933.12 and 8,418.90 is: 11,611.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,727.82 : 18,933.12 = 8,418.90 : x
  2. Step 2: Convert to fraction form
    13,727.82/18,933.12 = 8,418.90/x
  3. Step 3: Cross multiply
    13,727.82x = 18,933.12 × 8,418.90
  4. Step 4: Simplify right side
    13,727.82x = 159,396,043.97
  5. Step 5: Solve for x
    x = 159,396,043.97/13,727.82
  6. Step 6: Final answer
    x = 11,611.17

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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.