Home / 20,517.26-30,747.81-11,145.02

Finding the Fourth Proportional to 20,517.26, 30,747.81 and 11,145.02

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Solution

The fourth proportional to 20,517.26, 30,747.81 and 11,145.02 is: 16,702.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.26 : 30,747.81 = 11,145.02 : x
  2. Step 2: Convert to fraction form
    20,517.26/30,747.81 = 11,145.02/x
  3. Step 3: Cross multiply
    20,517.26x = 30,747.81 × 11,145.02
  4. Step 4: Simplify right side
    20,517.26x = 342,684,957.41
  5. Step 5: Solve for x
    x = 342,684,957.41/20,517.26
  6. Step 6: Final answer
    x = 16,702.28

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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.