Home / 19,695.40-27,171.91-12,128.61

Finding the Fourth Proportional to 19,695.40, 27,171.91 and 12,128.61

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Solution

The fourth proportional to 19,695.40, 27,171.91 and 12,128.61 is: 16,732.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,695.40 : 27,171.91 = 12,128.61 : x
  2. Step 2: Convert to fraction form
    19,695.40/27,171.91 = 12,128.61/x
  3. Step 3: Cross multiply
    19,695.40x = 27,171.91 × 12,128.61
  4. Step 4: Simplify right side
    19,695.40x = 329,557,463.56
  5. Step 5: Solve for x
    x = 329,557,463.56/19,695.40
  6. Step 6: Final answer
    x = 16,732.71

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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.