Home / 5,405.46-8,105.13-3,215.58

Finding the Fourth Proportional to 5,405.46, 8,105.13 and 3,215.58

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Solution

The fourth proportional to 5,405.46, 8,105.13 and 3,215.58 is: 4,821.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.46 : 8,105.13 = 3,215.58 : x
  2. Step 2: Convert to fraction form
    5,405.46/8,105.13 = 3,215.58/x
  3. Step 3: Cross multiply
    5,405.46x = 8,105.13 × 3,215.58
  4. Step 4: Simplify right side
    5,405.46x = 26,062,693.93
  5. Step 5: Solve for x
    x = 26,062,693.93/5,405.46
  6. Step 6: Final answer
    x = 4,821.55

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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.