Home / 20,942.44-31,415.37-7,791.64

Finding the Fourth Proportional to 20,942.44, 31,415.37 and 7,791.64

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Solution

The fourth proportional to 20,942.44, 31,415.37 and 7,791.64 is: 11,688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.44 : 31,415.37 = 7,791.64 : x
  2. Step 2: Convert to fraction form
    20,942.44/31,415.37 = 7,791.64/x
  3. Step 3: Cross multiply
    20,942.44x = 31,415.37 × 7,791.64
  4. Step 4: Simplify right side
    20,942.44x = 244,777,253.51
  5. Step 5: Solve for x
    x = 244,777,253.51/20,942.44
  6. Step 6: Final answer
    x = 11,688.10

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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.