Home / 13,608.73-20,420.87-5,287.67

Finding the Fourth Proportional to 13,608.73, 20,420.87 and 5,287.67

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Solution

The fourth proportional to 13,608.73, 20,420.87 and 5,287.67 is: 7,934.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.73 : 20,420.87 = 5,287.67 : x
  2. Step 2: Convert to fraction form
    13,608.73/20,420.87 = 5,287.67/x
  3. Step 3: Cross multiply
    13,608.73x = 20,420.87 × 5,287.67
  4. Step 4: Simplify right side
    13,608.73x = 107,978,821.67
  5. Step 5: Solve for x
    x = 107,978,821.67/13,608.73
  6. Step 6: Final answer
    x = 7,934.53

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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.