Home / 13,721.91-18,942.78-9,192.39

Finding the Fourth Proportional to 13,721.91, 18,942.78 and 9,192.39

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Solution

The fourth proportional to 13,721.91, 18,942.78 and 9,192.39 is: 12,689.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.91 : 18,942.78 = 9,192.39 : x
  2. Step 2: Convert to fraction form
    13,721.91/18,942.78 = 9,192.39/x
  3. Step 3: Cross multiply
    13,721.91x = 18,942.78 × 9,192.39
  4. Step 4: Simplify right side
    13,721.91x = 174,129,421.44
  5. Step 5: Solve for x
    x = 174,129,421.44/13,721.91
  6. Step 6: Final answer
    x = 12,689.88

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.