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Finding the Fourth Proportional to 19,296.88, 28,912.22 and 12,959.88

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Solution

The fourth proportional to 19,296.88, 28,912.22 and 12,959.88 is: 19,417.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,296.88 : 28,912.22 = 12,959.88 : x
  2. Step 2: Convert to fraction form
    19,296.88/28,912.22 = 12,959.88/x
  3. Step 3: Cross multiply
    19,296.88x = 28,912.22 × 12,959.88
  4. Step 4: Simplify right side
    19,296.88x = 374,698,901.73
  5. Step 5: Solve for x
    x = 374,698,901.73/19,296.88
  6. Step 6: Final answer
    x = 19,417.59

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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.