Home / 19,431.79-29,129.19-12,392.04

Finding the Fourth Proportional to 19,431.79, 29,129.19 and 12,392.04

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Solution

The fourth proportional to 19,431.79, 29,129.19 and 12,392.04 is: 18,576.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.79 : 29,129.19 = 12,392.04 : x
  2. Step 2: Convert to fraction form
    19,431.79/29,129.19 = 12,392.04/x
  3. Step 3: Cross multiply
    19,431.79x = 29,129.19 × 12,392.04
  4. Step 4: Simplify right side
    19,431.79x = 360,970,087.65
  5. Step 5: Solve for x
    x = 360,970,087.65/19,431.79
  6. Step 6: Final answer
    x = 18,576.27

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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.