Home / 20,821.30-31,244.15-7,682.82

Finding the Fourth Proportional to 20,821.30, 31,244.15 and 7,682.82

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Solution

The fourth proportional to 20,821.30, 31,244.15 and 7,682.82 is: 11,528.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.30 : 31,244.15 = 7,682.82 : x
  2. Step 2: Convert to fraction form
    20,821.30/31,244.15 = 7,682.82/x
  3. Step 3: Cross multiply
    20,821.30x = 31,244.15 × 7,682.82
  4. Step 4: Simplify right side
    20,821.30x = 240,043,180.50
  5. Step 5: Solve for x
    x = 240,043,180.50/20,821.30
  6. Step 6: Final answer
    x = 11,528.73

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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.