Home / 21,029.91-29,021.24-12,078

Finding the Fourth Proportional to 21,029.91, 29,021.24 and 12,078

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Solution

The fourth proportional to 21,029.91, 29,021.24 and 12,078 is: 16,667.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.91 : 29,021.24 = 12,078 : x
  2. Step 2: Convert to fraction form
    21,029.91/29,021.24 = 12,078/x
  3. Step 3: Cross multiply
    21,029.91x = 29,021.24 × 12,078
  4. Step 4: Simplify right side
    21,029.91x = 350,518,476.33
  5. Step 5: Solve for x
    x = 350,518,476.33/21,029.91
  6. Step 6: Final answer
    x = 16,667.62

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Why These Related Problems?

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