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Finding the Fourth Proportional to 12,425.42, 18,645.44 and 8,911.64

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Solution

The fourth proportional to 12,425.42, 18,645.44 and 8,911.64 is: 13,372.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.42 : 18,645.44 = 8,911.64 : x
  2. Step 2: Convert to fraction form
    12,425.42/18,645.44 = 8,911.64/x
  3. Step 3: Cross multiply
    12,425.42x = 18,645.44 × 8,911.64
  4. Step 4: Simplify right side
    12,425.42x = 166,161,450.98
  5. Step 5: Solve for x
    x = 166,161,450.98/12,425.42
  6. Step 6: Final answer
    x = 13,372.70

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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.