Home / 21,983.80-32,969.30-7,942.20

Finding the Fourth Proportional to 21,983.80, 32,969.30 and 7,942.20

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Solution

The fourth proportional to 21,983.80, 32,969.30 and 7,942.20 is: 11,910.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.80 : 32,969.30 = 7,942.20 : x
  2. Step 2: Convert to fraction form
    21,983.80/32,969.30 = 7,942.20/x
  3. Step 3: Cross multiply
    21,983.80x = 32,969.30 × 7,942.20
  4. Step 4: Simplify right side
    21,983.80x = 261,848,774.46
  5. Step 5: Solve for x
    x = 261,848,774.46/21,983.80
  6. Step 6: Final answer
    x = 11,910.99

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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.