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Finding the Fourth Proportional to 13,884.80, 20,794.80 and 13,606.40

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Solution

The fourth proportional to 13,884.80, 20,794.80 and 13,606.40 is: 20,377.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,884.80 : 20,794.80 = 13,606.40 : x
  2. Step 2: Convert to fraction form
    13,884.80/20,794.80 = 13,606.40/x
  3. Step 3: Cross multiply
    13,884.80x = 20,794.80 × 13,606.40
  4. Step 4: Simplify right side
    13,884.80x = 282,942,366.72
  5. Step 5: Solve for x
    x = 282,942,366.72/13,884.80
  6. Step 6: Final answer
    x = 20,377.85

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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.