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Finding the Fourth Proportional to 12,338.92, 18,510.30 and 4,129

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Solution

The fourth proportional to 12,338.92, 18,510.30 and 4,129 is: 6,194.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,338.92 : 18,510.30 = 4,129 : x
  2. Step 2: Convert to fraction form
    12,338.92/18,510.30 = 4,129/x
  3. Step 3: Cross multiply
    12,338.92x = 18,510.30 × 4,129
  4. Step 4: Simplify right side
    12,338.92x = 76,429,028.70
  5. Step 5: Solve for x
    x = 76,429,028.70/12,338.92
  6. Step 6: Final answer
    x = 6,194.14

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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.