Home / 21,146.50-31,731.41-11,791.77

Finding the Fourth Proportional to 21,146.50, 31,731.41 and 11,791.77

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Solution

The fourth proportional to 21,146.50, 31,731.41 and 11,791.77 is: 17,694.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.50 : 31,731.41 = 11,791.77 : x
  2. Step 2: Convert to fraction form
    21,146.50/31,731.41 = 11,791.77/x
  3. Step 3: Cross multiply
    21,146.50x = 31,731.41 × 11,791.77
  4. Step 4: Simplify right side
    21,146.50x = 374,169,488.50
  5. Step 5: Solve for x
    x = 374,169,488.50/21,146.50
  6. Step 6: Final answer
    x = 17,694.16

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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.