Home / 20,936.64-31,405.76-6,145.60

Finding the Fourth Proportional to 20,936.64, 31,405.76 and 6,145.60

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Solution

The fourth proportional to 20,936.64, 31,405.76 and 6,145.60 is: 9,218.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.64 : 31,405.76 = 6,145.60 : x
  2. Step 2: Convert to fraction form
    20,936.64/31,405.76 = 6,145.60/x
  3. Step 3: Cross multiply
    20,936.64x = 31,405.76 × 6,145.60
  4. Step 4: Simplify right side
    20,936.64x = 193,007,238.66
  5. Step 5: Solve for x
    x = 193,007,238.66/20,936.64
  6. Step 6: Final answer
    x = 9,218.63

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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.