Home / 13,849.48-20,772.35-3,989.76

Finding the Fourth Proportional to 13,849.48, 20,772.35 and 3,989.76

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Solution

The fourth proportional to 13,849.48, 20,772.35 and 3,989.76 is: 5,984.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,849.48 : 20,772.35 = 3,989.76 : x
  2. Step 2: Convert to fraction form
    13,849.48/20,772.35 = 3,989.76/x
  3. Step 3: Cross multiply
    13,849.48x = 20,772.35 × 3,989.76
  4. Step 4: Simplify right side
    13,849.48x = 82,876,608.25
  5. Step 5: Solve for x
    x = 82,876,608.25/13,849.48
  6. Step 6: Final answer
    x = 5,984.09

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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.