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Finding the Fourth Proportional to 18,505.80, 27,734.40 and 13,305.60

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Solution

The fourth proportional to 18,505.80, 27,734.40 and 13,305.60 is: 19,940.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.80 : 27,734.40 = 13,305.60 : x
  2. Step 2: Convert to fraction form
    18,505.80/27,734.40 = 13,305.60/x
  3. Step 3: Cross multiply
    18,505.80x = 27,734.40 × 13,305.60
  4. Step 4: Simplify right side
    18,505.80x = 369,022,832.64
  5. Step 5: Solve for x
    x = 369,022,832.64/18,505.80
  6. Step 6: Final answer
    x = 19,940.93

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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.