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Finding the Fourth Proportional to 18,505.99, 25,531.09 and 11,790.42

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Solution

The fourth proportional to 18,505.99, 25,531.09 and 11,790.42 is: 16,266.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.99 : 25,531.09 = 11,790.42 : x
  2. Step 2: Convert to fraction form
    18,505.99/25,531.09 = 11,790.42/x
  3. Step 3: Cross multiply
    18,505.99x = 25,531.09 × 11,790.42
  4. Step 4: Simplify right side
    18,505.99x = 301,022,274.16
  5. Step 5: Solve for x
    x = 301,022,274.16/18,505.99
  6. Step 6: Final answer
    x = 16,266.21

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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.