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Finding the Fourth Proportional to 12,372.80, 18,555.60 and 6,828.80

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Solution

The fourth proportional to 12,372.80, 18,555.60 and 6,828.80 is: 10,241.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,372.80 : 18,555.60 = 6,828.80 : x
  2. Step 2: Convert to fraction form
    12,372.80/18,555.60 = 6,828.80/x
  3. Step 3: Cross multiply
    12,372.80x = 18,555.60 × 6,828.80
  4. Step 4: Simplify right side
    12,372.80x = 126,712,481.28
  5. Step 5: Solve for x
    x = 126,712,481.28/12,372.80
  6. Step 6: Final answer
    x = 10,241.21

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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.