Home / 20,936.88-31,412.61-7,797.87

Finding the Fourth Proportional to 20,936.88, 31,412.61 and 7,797.87

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Solution

The fourth proportional to 20,936.88, 31,412.61 and 7,797.87 is: 11,699.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.88 : 31,412.61 = 7,797.87 : x
  2. Step 2: Convert to fraction form
    20,936.88/31,412.61 = 7,797.87/x
  3. Step 3: Cross multiply
    20,936.88x = 31,412.61 × 7,797.87
  4. Step 4: Simplify right side
    20,936.88x = 244,951,449.14
  5. Step 5: Solve for x
    x = 244,951,449.14/20,936.88
  6. Step 6: Final answer
    x = 11,699.52

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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.