Home / 20,252.20-30,378.30-12,889.30

Finding the Fourth Proportional to 20,252.20, 30,378.30 and 12,889.30

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Solution

The fourth proportional to 20,252.20, 30,378.30 and 12,889.30 is: 19,333.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,252.20 : 30,378.30 = 12,889.30 : x
  2. Step 2: Convert to fraction form
    20,252.20/30,378.30 = 12,889.30/x
  3. Step 3: Cross multiply
    20,252.20x = 30,378.30 × 12,889.30
  4. Step 4: Simplify right side
    20,252.20x = 391,555,022.19
  5. Step 5: Solve for x
    x = 391,555,022.19/20,252.20
  6. Step 6: Final answer
    x = 19,333.95

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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.