Home / 20,473.23-30,687.30-7,990.95

Finding the Fourth Proportional to 20,473.23, 30,687.30 and 7,990.95

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Solution

The fourth proportional to 20,473.23, 30,687.30 and 7,990.95 is: 11,977.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,473.23 : 30,687.30 = 7,990.95 : x
  2. Step 2: Convert to fraction form
    20,473.23/30,687.30 = 7,990.95/x
  3. Step 3: Cross multiply
    20,473.23x = 30,687.30 × 7,990.95
  4. Step 4: Simplify right side
    20,473.23x = 245,220,679.94
  5. Step 5: Solve for x
    x = 245,220,679.94/20,473.23
  6. Step 6: Final answer
    x = 11,977.63

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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.