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Finding the Fourth Proportional to 12,672.66, 19,007.37 and 5,275.74

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Solution

The fourth proportional to 12,672.66, 19,007.37 and 5,275.74 is: 7,912.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672.66 : 19,007.37 = 5,275.74 : x
  2. Step 2: Convert to fraction form
    12,672.66/19,007.37 = 5,275.74/x
  3. Step 3: Cross multiply
    12,672.66x = 19,007.37 × 5,275.74
  4. Step 4: Simplify right side
    12,672.66x = 100,277,942.20
  5. Step 5: Solve for x
    x = 100,277,942.20/12,672.66
  6. Step 6: Final answer
    x = 7,912.94

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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.