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Finding the Fourth Proportional to 18,976.25, 28,464.38 and 5,125.25

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Solution

The fourth proportional to 18,976.25, 28,464.38 and 5,125.25 is: 7,687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.25 : 28,464.38 = 5,125.25 : x
  2. Step 2: Convert to fraction form
    18,976.25/28,464.38 = 5,125.25/x
  3. Step 3: Cross multiply
    18,976.25x = 28,464.38 × 5,125.25
  4. Step 4: Simplify right side
    18,976.25x = 145,887,063.60
  5. Step 5: Solve for x
    x = 145,887,063.60/18,976.25
  6. Step 6: Final answer
    x = 7,687.88

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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.