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Finding the Fourth Proportional to 21,958.26, 32,937.88 and 7,919.42

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Solution

The fourth proportional to 21,958.26, 32,937.88 and 7,919.42 is: 11,879.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.26 : 32,937.88 = 7,919.42 : x
  2. Step 2: Convert to fraction form
    21,958.26/32,937.88 = 7,919.42/x
  3. Step 3: Cross multiply
    21,958.26x = 32,937.88 × 7,919.42
  4. Step 4: Simplify right side
    21,958.26x = 260,848,905.63
  5. Step 5: Solve for x
    x = 260,848,905.63/21,958.26
  6. Step 6: Final answer
    x = 11,879.31

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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.