Home / 20,640.14-30,942.92-8,325.26

Finding the Fourth Proportional to 20,640.14, 30,942.92 and 8,325.26

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Solution

The fourth proportional to 20,640.14, 30,942.92 and 8,325.26 is: 12,480.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.14 : 30,942.92 = 8,325.26 : x
  2. Step 2: Convert to fraction form
    20,640.14/30,942.92 = 8,325.26/x
  3. Step 3: Cross multiply
    20,640.14x = 30,942.92 × 8,325.26
  4. Step 4: Simplify right side
    20,640.14x = 257,607,854.16
  5. Step 5: Solve for x
    x = 257,607,854.16/20,640.14
  6. Step 6: Final answer
    x = 12,480.92

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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.