Home / 20,874.96-31,313-5,293.80

Finding the Fourth Proportional to 20,874.96, 31,313 and 5,293.80

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Solution

The fourth proportional to 20,874.96, 31,313 and 5,293.80 is: 7,940.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.96 : 31,313 = 5,293.80 : x
  2. Step 2: Convert to fraction form
    20,874.96/31,313 = 5,293.80/x
  3. Step 3: Cross multiply
    20,874.96x = 31,313 × 5,293.80
  4. Step 4: Simplify right side
    20,874.96x = 165,764,759.40
  5. Step 5: Solve for x
    x = 165,764,759.40/20,874.96
  6. Step 6: Final answer
    x = 7,940.84

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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.