Home / 21,168.40-31,747.92-8,020.48

Finding the Fourth Proportional to 21,168.40, 31,747.92 and 8,020.48

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Solution

The fourth proportional to 21,168.40, 31,747.92 and 8,020.48 is: 12,028.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.40 : 31,747.92 = 8,020.48 : x
  2. Step 2: Convert to fraction form
    21,168.40/31,747.92 = 8,020.48/x
  3. Step 3: Cross multiply
    21,168.40x = 31,747.92 × 8,020.48
  4. Step 4: Simplify right side
    21,168.40x = 254,633,557.40
  5. Step 5: Solve for x
    x = 254,633,557.40/21,168.40
  6. Step 6: Final answer
    x = 12,028.95

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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.