Home / 21,219.57-31,825.24-20,165.85

Finding the Fourth Proportional to 21,219.57, 31,825.24 and 20,165.85

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Solution

The fourth proportional to 21,219.57, 31,825.24 and 20,165.85 is: 30,244.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.57 : 31,825.24 = 20,165.85 : x
  2. Step 2: Convert to fraction form
    21,219.57/31,825.24 = 20,165.85/x
  3. Step 3: Cross multiply
    21,219.57x = 31,825.24 × 20,165.85
  4. Step 4: Simplify right side
    21,219.57x = 641,782,965.64
  5. Step 5: Solve for x
    x = 641,782,965.64/21,219.57
  6. Step 6: Final answer
    x = 30,244.86

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1.5x scale

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.