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Finding the Fourth Proportional to 12,930.58, 17,845.28 and 7,626.43

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Solution

The fourth proportional to 12,930.58, 17,845.28 and 7,626.43 is: 10,525.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.58 : 17,845.28 = 7,626.43 : x
  2. Step 2: Convert to fraction form
    12,930.58/17,845.28 = 7,626.43/x
  3. Step 3: Cross multiply
    12,930.58x = 17,845.28 × 7,626.43
  4. Step 4: Simplify right side
    12,930.58x = 136,095,778.75
  5. Step 5: Solve for x
    x = 136,095,778.75/12,930.58
  6. Step 6: Final answer
    x = 10,525.11

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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.