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Finding the Fourth Proportional to 18,935.83, 28,403.75 and 11,995.75

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Solution

The fourth proportional to 18,935.83, 28,403.75 and 11,995.75 is: 17,993.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,935.83 : 28,403.75 = 11,995.75 : x
  2. Step 2: Convert to fraction form
    18,935.83/28,403.75 = 11,995.75/x
  3. Step 3: Cross multiply
    18,935.83x = 28,403.75 × 11,995.75
  4. Step 4: Simplify right side
    18,935.83x = 340,724,284.06
  5. Step 5: Solve for x
    x = 340,724,284.06/18,935.83
  6. Step 6: Final answer
    x = 17,993.63

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Similar ratio
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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.