Home / 31,721.66-43,772.90-18,972.21

Finding the Fourth Proportional to 31,721.66, 43,772.90 and 18,972.21

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Solution

The fourth proportional to 31,721.66, 43,772.90 and 18,972.21 is: 26,179.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,721.66 : 43,772.90 = 18,972.21 : x
  2. Step 2: Convert to fraction form
    31,721.66/43,772.90 = 18,972.21/x
  3. Step 3: Cross multiply
    31,721.66x = 43,772.90 × 18,972.21
  4. Step 4: Simplify right side
    31,721.66x = 830,468,556.25
  5. Step 5: Solve for x
    x = 830,468,556.25/31,721.66
  6. Step 6: Final answer
    x = 26,179.86

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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.