Home / 20,743.26-28,640.43-12,787.98

Finding the Fourth Proportional to 20,743.26, 28,640.43 and 12,787.98

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Solution

The fourth proportional to 20,743.26, 28,640.43 and 12,787.98 is: 17,656.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.26 : 28,640.43 = 12,787.98 : x
  2. Step 2: Convert to fraction form
    20,743.26/28,640.43 = 12,787.98/x
  3. Step 3: Cross multiply
    20,743.26x = 28,640.43 × 12,787.98
  4. Step 4: Simplify right side
    20,743.26x = 366,253,246.03
  5. Step 5: Solve for x
    x = 366,253,246.03/20,743.26
  6. Step 6: Final answer
    x = 17,656.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.