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Finding the Fourth Proportional to 13,880.80, 20,809.05 and 8,336.35

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Solution

The fourth proportional to 13,880.80, 20,809.05 and 8,336.35 is: 12,497.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.80 : 20,809.05 = 8,336.35 : x
  2. Step 2: Convert to fraction form
    13,880.80/20,809.05 = 8,336.35/x
  3. Step 3: Cross multiply
    13,880.80x = 20,809.05 × 8,336.35
  4. Step 4: Simplify right side
    13,880.80x = 173,471,523.97
  5. Step 5: Solve for x
    x = 173,471,523.97/13,880.80
  6. Step 6: Final answer
    x = 12,497.23

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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.