Home / 20,982.63-31,469.10-5,989.46

Finding the Fourth Proportional to 20,982.63, 31,469.10 and 5,989.46

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Solution

The fourth proportional to 20,982.63, 31,469.10 and 5,989.46 is: 8,982.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.63 : 31,469.10 = 5,989.46 : x
  2. Step 2: Convert to fraction form
    20,982.63/31,469.10 = 5,989.46/x
  3. Step 3: Cross multiply
    20,982.63x = 31,469.10 × 5,989.46
  4. Step 4: Simplify right side
    20,982.63x = 188,482,915.69
  5. Step 5: Solve for x
    x = 188,482,915.69/20,982.63
  6. Step 6: Final answer
    x = 8,982.81

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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.