Home / 21,329.80-31,956.30-18,257.80

Finding the Fourth Proportional to 21,329.80, 31,956.30 and 18,257.80

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Solution

The fourth proportional to 21,329.80, 31,956.30 and 18,257.80 is: 27,353.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.80 : 31,956.30 = 18,257.80 : x
  2. Step 2: Convert to fraction form
    21,329.80/31,956.30 = 18,257.80/x
  3. Step 3: Cross multiply
    21,329.80x = 31,956.30 × 18,257.80
  4. Step 4: Simplify right side
    21,329.80x = 583,451,734.14
  5. Step 5: Solve for x
    x = 583,451,734.14/21,329.80
  6. Step 6: Final answer
    x = 27,353.83

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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.