Home / 20,309.21-30,455.09-6,983.54

Finding the Fourth Proportional to 20,309.21, 30,455.09 and 6,983.54

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Solution

The fourth proportional to 20,309.21, 30,455.09 and 6,983.54 is: 10,472.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.21 : 30,455.09 = 6,983.54 : x
  2. Step 2: Convert to fraction form
    20,309.21/30,455.09 = 6,983.54/x
  3. Step 3: Cross multiply
    20,309.21x = 30,455.09 × 6,983.54
  4. Step 4: Simplify right side
    20,309.21x = 212,684,339.22
  5. Step 5: Solve for x
    x = 212,684,339.22/20,309.21
  6. Step 6: Final answer
    x = 10,472.31

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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.