Home / 20,821.92-31,232.90-5,239.54

Finding the Fourth Proportional to 20,821.92, 31,232.90 and 5,239.54

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Solution

The fourth proportional to 20,821.92, 31,232.90 and 5,239.54 is: 7,859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.92 : 31,232.90 = 5,239.54 : x
  2. Step 2: Convert to fraction form
    20,821.92/31,232.90 = 5,239.54/x
  3. Step 3: Cross multiply
    20,821.92x = 31,232.90 × 5,239.54
  4. Step 4: Simplify right side
    20,821.92x = 163,646,028.87
  5. Step 5: Solve for x
    x = 163,646,028.87/20,821.92
  6. Step 6: Final answer
    x = 7,859.32

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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.