Home / 31,684.30-43,721.36-18,934.95

Finding the Fourth Proportional to 31,684.30, 43,721.36 and 18,934.95

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Solution

The fourth proportional to 31,684.30, 43,721.36 and 18,934.95 is: 26,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,684.30 : 43,721.36 = 18,934.95 : x
  2. Step 2: Convert to fraction form
    31,684.30/43,721.36 = 18,934.95/x
  3. Step 3: Cross multiply
    31,684.30x = 43,721.36 × 18,934.95
  4. Step 4: Simplify right side
    31,684.30x = 827,861,765.53
  5. Step 5: Solve for x
    x = 827,861,765.53/31,684.30
  6. Step 6: Final answer
    x = 26,128.45

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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.