Home / 21,163.38-31,744.80-7,126.50

Finding the Fourth Proportional to 21,163.38, 31,744.80 and 7,126.50

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Solution

The fourth proportional to 21,163.38, 31,744.80 and 7,126.50 is: 10,689.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.38 : 31,744.80 = 7,126.50 : x
  2. Step 2: Convert to fraction form
    21,163.38/31,744.80 = 7,126.50/x
  3. Step 3: Cross multiply
    21,163.38x = 31,744.80 × 7,126.50
  4. Step 4: Simplify right side
    21,163.38x = 226,229,317.20
  5. Step 5: Solve for x
    x = 226,229,317.20/21,163.38
  6. Step 6: Final answer
    x = 10,689.66

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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.