Home / 21,166.82-31,687.91-15,644.78

Finding the Fourth Proportional to 21,166.82, 31,687.91 and 15,644.78

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Solution

The fourth proportional to 21,166.82, 31,687.91 and 15,644.78 is: 23,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.82 : 31,687.91 = 15,644.78 : x
  2. Step 2: Convert to fraction form
    21,166.82/31,687.91 = 15,644.78/x
  3. Step 3: Cross multiply
    21,166.82x = 31,687.91 × 15,644.78
  4. Step 4: Simplify right side
    21,166.82x = 495,750,143.95
  5. Step 5: Solve for x
    x = 495,750,143.95/21,166.82
  6. Step 6: Final answer
    x = 23,421.10

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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.