Home / 20,801.46-31,175.38-18,122.21

Finding the Fourth Proportional to 20,801.46, 31,175.38 and 18,122.21

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Solution

The fourth proportional to 20,801.46, 31,175.38 and 18,122.21 is: 27,159.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.46 : 31,175.38 = 18,122.21 : x
  2. Step 2: Convert to fraction form
    20,801.46/31,175.38 = 18,122.21/x
  3. Step 3: Cross multiply
    20,801.46x = 31,175.38 × 18,122.21
  4. Step 4: Simplify right side
    20,801.46x = 564,966,942.23
  5. Step 5: Solve for x
    x = 564,966,942.23/20,801.46
  6. Step 6: Final answer
    x = 27,159.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.