Home / 20,839.44-31,237.20-12,942

Finding the Fourth Proportional to 20,839.44, 31,237.20 and 12,942

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Solution

The fourth proportional to 20,839.44, 31,237.20 and 12,942 is: 19,399.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.44 : 31,237.20 = 12,942 : x
  2. Step 2: Convert to fraction form
    20,839.44/31,237.20 = 12,942/x
  3. Step 3: Cross multiply
    20,839.44x = 31,237.20 × 12,942
  4. Step 4: Simplify right side
    20,839.44x = 404,271,842.40
  5. Step 5: Solve for x
    x = 404,271,842.40/20,839.44
  6. Step 6: Final answer
    x = 19,399.36

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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.