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Finding the Fourth Proportional to 20,550.80, 30,826.20 and 12,256.40

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Solution

The fourth proportional to 20,550.80, 30,826.20 and 12,256.40 is: 18,384.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.80 : 30,826.20 = 12,256.40 : x
  2. Step 2: Convert to fraction form
    20,550.80/30,826.20 = 12,256.40/x
  3. Step 3: Cross multiply
    20,550.80x = 30,826.20 × 12,256.40
  4. Step 4: Simplify right side
    20,550.80x = 377,818,237.68
  5. Step 5: Solve for x
    x = 377,818,237.68/20,550.80
  6. Step 6: Final answer
    x = 18,384.60

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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.