Home / 20,218.20-30,327.30-12,855.30

Finding the Fourth Proportional to 20,218.20, 30,327.30 and 12,855.30

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Solution

The fourth proportional to 20,218.20, 30,327.30 and 12,855.30 is: 19,282.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.20 : 30,327.30 = 12,855.30 : x
  2. Step 2: Convert to fraction form
    20,218.20/30,327.30 = 12,855.30/x
  3. Step 3: Cross multiply
    20,218.20x = 30,327.30 × 12,855.30
  4. Step 4: Simplify right side
    20,218.20x = 389,866,539.69
  5. Step 5: Solve for x
    x = 389,866,539.69/20,218.20
  6. Step 6: Final answer
    x = 19,282.95

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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.