Home / 31,067.14-42,872.70-16,920.04

Finding the Fourth Proportional to 31,067.14, 42,872.70 and 16,920.04

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Solution

The fourth proportional to 31,067.14, 42,872.70 and 16,920.04 is: 23,349.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,067.14 : 42,872.70 = 16,920.04 : x
  2. Step 2: Convert to fraction form
    31,067.14/42,872.70 = 16,920.04/x
  3. Step 3: Cross multiply
    31,067.14x = 42,872.70 × 16,920.04
  4. Step 4: Simplify right side
    31,067.14x = 725,407,798.91
  5. Step 5: Solve for x
    x = 725,407,798.91/31,067.14
  6. Step 6: Final answer
    x = 23,349.68

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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.