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Finding the Fourth Proportional to 18,505.49, 25,530.41 and 11,789.92

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Solution

The fourth proportional to 18,505.49, 25,530.41 and 11,789.92 is: 16,265.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.49 : 25,530.41 = 11,789.92 : x
  2. Step 2: Convert to fraction form
    18,505.49/25,530.41 = 11,789.92/x
  3. Step 3: Cross multiply
    18,505.49x = 25,530.41 × 11,789.92
  4. Step 4: Simplify right side
    18,505.49x = 301,001,304.87
  5. Step 5: Solve for x
    x = 301,001,304.87/18,505.49
  6. Step 6: Final answer
    x = 16,265.51

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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.