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Finding the Fourth Proportional to 12,425.08, 17,143.20 and 8,644

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Solution

The fourth proportional to 12,425.08, 17,143.20 and 8,644 is: 11,926.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.08 : 17,143.20 = 8,644 : x
  2. Step 2: Convert to fraction form
    12,425.08/17,143.20 = 8,644/x
  3. Step 3: Cross multiply
    12,425.08x = 17,143.20 × 8,644
  4. Step 4: Simplify right side
    12,425.08x = 148,185,820.80
  5. Step 5: Solve for x
    x = 148,185,820.80/12,425.08
  6. Step 6: Final answer
    x = 11,926.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.