Home / 18,912.30-28,369.80-5,764.68

Finding the Fourth Proportional to 18,912.30, 28,369.80 and 5,764.68

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Solution

The fourth proportional to 18,912.30, 28,369.80 and 5,764.68 is: 8,647.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.30 : 28,369.80 = 5,764.68 : x
  2. Step 2: Convert to fraction form
    18,912.30/28,369.80 = 5,764.68/x
  3. Step 3: Cross multiply
    18,912.30x = 28,369.80 × 5,764.68
  4. Step 4: Simplify right side
    18,912.30x = 163,542,818.66
  5. Step 5: Solve for x
    x = 163,542,818.66/18,912.30
  6. Step 6: Final answer
    x = 8,647.43

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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.