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Finding the Fourth Proportional to 13,908.30, 20,738.39 and 12,362.82

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Solution

The fourth proportional to 13,908.30, 20,738.39 and 12,362.82 is: 18,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908.30 : 20,738.39 = 12,362.82 : x
  2. Step 2: Convert to fraction form
    13,908.30/20,738.39 = 12,362.82/x
  3. Step 3: Cross multiply
    13,908.30x = 20,738.39 × 12,362.82
  4. Step 4: Simplify right side
    13,908.30x = 256,384,982.66
  5. Step 5: Solve for x
    x = 256,384,982.66/13,908.30
  6. Step 6: Final answer
    x = 18,433.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.