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Finding the Fourth Proportional to 13,654.40, 18,803.41 and 11,861.06

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Solution

The fourth proportional to 13,654.40, 18,803.41 and 11,861.06 is: 16,333.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,654.40 : 18,803.41 = 11,861.06 : x
  2. Step 2: Convert to fraction form
    13,654.40/18,803.41 = 11,861.06/x
  3. Step 3: Cross multiply
    13,654.40x = 18,803.41 × 11,861.06
  4. Step 4: Simplify right side
    13,654.40x = 223,028,250.54
  5. Step 5: Solve for x
    x = 223,028,250.54/13,654.40
  6. Step 6: Final answer
    x = 16,333.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.