Home / 20,754.52-31,131.89-5,172.14

Finding the Fourth Proportional to 20,754.52, 31,131.89 and 5,172.14

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Solution

The fourth proportional to 20,754.52, 31,131.89 and 5,172.14 is: 7,758.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.52 : 31,131.89 = 5,172.14 : x
  2. Step 2: Convert to fraction form
    20,754.52/31,131.89 = 5,172.14/x
  3. Step 3: Cross multiply
    20,754.52x = 31,131.89 × 5,172.14
  4. Step 4: Simplify right side
    20,754.52x = 161,018,493.54
  5. Step 5: Solve for x
    x = 161,018,493.54/20,754.52
  6. Step 6: Final answer
    x = 7,758.24

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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.