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Finding the Fourth Proportional to 30,991.56, 42,768.41 and 16,844.37

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Solution

The fourth proportional to 30,991.56, 42,768.41 and 16,844.37 is: 23,245.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,991.56 : 42,768.41 = 16,844.37 : x
  2. Step 2: Convert to fraction form
    30,991.56/42,768.41 = 16,844.37/x
  3. Step 3: Cross multiply
    30,991.56x = 42,768.41 × 16,844.37
  4. Step 4: Simplify right side
    30,991.56x = 720,406,922.35
  5. Step 5: Solve for x
    x = 720,406,922.35/30,991.56
  6. Step 6: Final answer
    x = 23,245.26

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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.