Home / 6,821.40-10,215.66-3,890.82

Finding the Fourth Proportional to 6,821.40, 10,215.66 and 3,890.82

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Solution

The fourth proportional to 6,821.40, 10,215.66 and 3,890.82 is: 5,826.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,821.40 : 10,215.66 = 3,890.82 : x
  2. Step 2: Convert to fraction form
    6,821.40/10,215.66 = 3,890.82/x
  3. Step 3: Cross multiply
    6,821.40x = 10,215.66 × 3,890.82
  4. Step 4: Simplify right side
    6,821.40x = 39,747,294.24
  5. Step 5: Solve for x
    x = 39,747,294.24/6,821.40
  6. Step 6: Final answer
    x = 5,826.85

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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.