Home / 21,190.36-31,791.30-7,340.44

Finding the Fourth Proportional to 21,190.36, 31,791.30 and 7,340.44

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Solution

The fourth proportional to 21,190.36, 31,791.30 and 7,340.44 is: 11,012.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.36 : 31,791.30 = 7,340.44 : x
  2. Step 2: Convert to fraction form
    21,190.36/31,791.30 = 7,340.44/x
  3. Step 3: Cross multiply
    21,190.36x = 31,791.30 × 7,340.44
  4. Step 4: Simplify right side
    21,190.36x = 233,362,130.17
  5. Step 5: Solve for x
    x = 233,362,130.17/21,190.36
  6. Step 6: Final answer
    x = 11,012.66

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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.