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Finding the Fourth Proportional to 20,361.56, 30,531.30 and 6,315.54

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Solution

The fourth proportional to 20,361.56, 30,531.30 and 6,315.54 is: 9,469.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.56 : 30,531.30 = 6,315.54 : x
  2. Step 2: Convert to fraction form
    20,361.56/30,531.30 = 6,315.54/x
  3. Step 3: Cross multiply
    20,361.56x = 30,531.30 × 6,315.54
  4. Step 4: Simplify right side
    20,361.56x = 192,821,646.40
  5. Step 5: Solve for x
    x = 192,821,646.40/20,361.56
  6. Step 6: Final answer
    x = 9,469.89

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1.5x scale

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.