Home / 21,121.66-31,679.61-5,537.98

Finding the Fourth Proportional to 21,121.66, 31,679.61 and 5,537.98

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Solution

The fourth proportional to 21,121.66, 31,679.61 and 5,537.98 is: 8,306.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.66 : 31,679.61 = 5,537.98 : x
  2. Step 2: Convert to fraction form
    21,121.66/31,679.61 = 5,537.98/x
  3. Step 3: Cross multiply
    21,121.66x = 31,679.61 × 5,537.98
  4. Step 4: Simplify right side
    21,121.66x = 175,441,046.59
  5. Step 5: Solve for x
    x = 175,441,046.59/21,121.66
  6. Step 6: Final answer
    x = 8,306.21

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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.