Home / 21,194.55-31,791.80-8,721.36

Finding the Fourth Proportional to 21,194.55, 31,791.80 and 8,721.36

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Solution

The fourth proportional to 21,194.55, 31,791.80 and 8,721.36 is: 13,082.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,194.55 : 31,791.80 = 8,721.36 : x
  2. Step 2: Convert to fraction form
    21,194.55/31,791.80 = 8,721.36/x
  3. Step 3: Cross multiply
    21,194.55x = 31,791.80 × 8,721.36
  4. Step 4: Simplify right side
    21,194.55x = 277,267,689.24
  5. Step 5: Solve for x
    x = 277,267,689.24/21,194.55
  6. Step 6: Final answer
    x = 13,082.03

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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.