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Finding the Fourth Proportional to 18,772.56, 25,909.07 and 11,216.48

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Solution

The fourth proportional to 18,772.56, 25,909.07 and 11,216.48 is: 15,480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.56 : 25,909.07 = 11,216.48 : x
  2. Step 2: Convert to fraction form
    18,772.56/25,909.07 = 11,216.48/x
  3. Step 3: Cross multiply
    18,772.56x = 25,909.07 × 11,216.48
  4. Step 4: Simplify right side
    18,772.56x = 290,608,379.85
  5. Step 5: Solve for x
    x = 290,608,379.85/18,772.56
  6. Step 6: Final answer
    x = 15,480.49

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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.