Home / 8,215.05-12,320.55-3,285.66

Finding the Fourth Proportional to 8,215.05, 12,320.55 and 3,285.66

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Solution

The fourth proportional to 8,215.05, 12,320.55 and 3,285.66 is: 4,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.05 : 12,320.55 = 3,285.66 : x
  2. Step 2: Convert to fraction form
    8,215.05/12,320.55 = 3,285.66/x
  3. Step 3: Cross multiply
    8,215.05x = 12,320.55 × 3,285.66
  4. Step 4: Simplify right side
    8,215.05x = 40,481,138.31
  5. Step 5: Solve for x
    x = 40,481,138.31/8,215.05
  6. Step 6: Final answer
    x = 4,927.68

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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.