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Finding the Fourth Proportional to 13,816.98, 20,739.90 and 12,245.99

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Solution

The fourth proportional to 13,816.98, 20,739.90 and 12,245.99 is: 18,381.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,816.98 : 20,739.90 = 12,245.99 : x
  2. Step 2: Convert to fraction form
    13,816.98/20,739.90 = 12,245.99/x
  3. Step 3: Cross multiply
    13,816.98x = 20,739.90 × 12,245.99
  4. Step 4: Simplify right side
    13,816.98x = 253,980,481.34
  5. Step 5: Solve for x
    x = 253,980,481.34/13,816.98
  6. Step 6: Final answer
    x = 18,381.77

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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.