Home / 5,318.44-7,340.42-3,990.12

Finding the Fourth Proportional to 5,318.44, 7,340.42 and 3,990.12

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Solution

The fourth proportional to 5,318.44, 7,340.42 and 3,990.12 is: 5,507.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.44 : 7,340.42 = 3,990.12 : x
  2. Step 2: Convert to fraction form
    5,318.44/7,340.42 = 3,990.12/x
  3. Step 3: Cross multiply
    5,318.44x = 7,340.42 × 3,990.12
  4. Step 4: Simplify right side
    5,318.44x = 29,289,156.65
  5. Step 5: Solve for x
    x = 29,289,156.65/5,318.44
  6. Step 6: Final answer
    x = 5,507.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.