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Finding the Fourth Proportional to 14,138.44, 21,182.22 and 7,891

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Solution

The fourth proportional to 14,138.44, 21,182.22 and 7,891 is: 11,822.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.44 : 21,182.22 = 7,891 : x
  2. Step 2: Convert to fraction form
    14,138.44/21,182.22 = 7,891/x
  3. Step 3: Cross multiply
    14,138.44x = 21,182.22 × 7,891
  4. Step 4: Simplify right side
    14,138.44x = 167,148,898.02
  5. Step 5: Solve for x
    x = 167,148,898.02/14,138.44
  6. Step 6: Final answer
    x = 11,822.30

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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.