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Finding the Fourth Proportional to 12,672.72, 19,004.22 and 8,765.28

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Solution

The fourth proportional to 12,672.72, 19,004.22 and 8,765.28 is: 13,144.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.72 : 19,004.22 = 8,765.28 : x
  2. Step 2: Convert to fraction form
    12,672.72/19,004.22 = 8,765.28/x
  3. Step 3: Cross multiply
    12,672.72x = 19,004.22 × 8,765.28
  4. Step 4: Simplify right side
    12,672.72x = 166,577,309.48
  5. Step 5: Solve for x
    x = 166,577,309.48/12,672.72
  6. Step 6: Final answer
    x = 13,144.56

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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.