Home / 31,422.38-43,369.49-19,929.85

Finding the Fourth Proportional to 31,422.38, 43,369.49 and 19,929.85

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Solution

The fourth proportional to 31,422.38, 43,369.49 and 19,929.85 is: 27,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,422.38 : 43,369.49 = 19,929.85 : x
  2. Step 2: Convert to fraction form
    31,422.38/43,369.49 = 19,929.85/x
  3. Step 3: Cross multiply
    31,422.38x = 43,369.49 × 19,929.85
  4. Step 4: Simplify right side
    31,422.38x = 864,347,113.78
  5. Step 5: Solve for x
    x = 864,347,113.78/31,422.38
  6. Step 6: Final answer
    x = 27,507.38

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1.5x scale

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.