Home / 20,438.25-30,640.68-10,580.37

Finding the Fourth Proportional to 20,438.25, 30,640.68 and 10,580.37

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Solution

The fourth proportional to 20,438.25, 30,640.68 and 10,580.37 is: 15,861.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.25 : 30,640.68 = 10,580.37 : x
  2. Step 2: Convert to fraction form
    20,438.25/30,640.68 = 10,580.37/x
  3. Step 3: Cross multiply
    20,438.25x = 30,640.68 × 10,580.37
  4. Step 4: Simplify right side
    20,438.25x = 324,189,731.45
  5. Step 5: Solve for x
    x = 324,189,731.45/20,438.25
  6. Step 6: Final answer
    x = 15,861.91

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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.