Home / 19,431.29-29,104.62-11,912.10

Finding the Fourth Proportional to 19,431.29, 29,104.62 and 11,912.10

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Solution

The fourth proportional to 19,431.29, 29,104.62 and 11,912.10 is: 17,842.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.29 : 29,104.62 = 11,912.10 : x
  2. Step 2: Convert to fraction form
    19,431.29/29,104.62 = 11,912.10/x
  3. Step 3: Cross multiply
    19,431.29x = 29,104.62 × 11,912.10
  4. Step 4: Simplify right side
    19,431.29x = 346,696,990.09
  5. Step 5: Solve for x
    x = 346,696,990.09/19,431.29
  6. Step 6: Final answer
    x = 17,842.20

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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.