Home / 20,052.21-30,061.40-12,640.33

Finding the Fourth Proportional to 20,052.21, 30,061.40 and 12,640.33

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Solution

The fourth proportional to 20,052.21, 30,061.40 and 12,640.33 is: 18,949.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,052.21 : 30,061.40 = 12,640.33 : x
  2. Step 2: Convert to fraction form
    20,052.21/30,061.40 = 12,640.33/x
  3. Step 3: Cross multiply
    20,052.21x = 30,061.40 × 12,640.33
  4. Step 4: Simplify right side
    20,052.21x = 379,985,990.64
  5. Step 5: Solve for x
    x = 379,985,990.64/20,052.21
  6. Step 6: Final answer
    x = 18,949.83

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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.