Home / 5,318.39-7,330.20-3,989.79

Finding the Fourth Proportional to 5,318.39, 7,330.20 and 3,989.79

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Solution

The fourth proportional to 5,318.39, 7,330.20 and 3,989.79 is: 5,499.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.39 : 7,330.20 = 3,989.79 : x
  2. Step 2: Convert to fraction form
    5,318.39/7,330.20 = 3,989.79/x
  3. Step 3: Cross multiply
    5,318.39x = 7,330.20 × 3,989.79
  4. Step 4: Simplify right side
    5,318.39x = 29,245,943.70
  5. Step 5: Solve for x
    x = 29,245,943.70/5,318.39
  6. Step 6: Final answer
    x = 5,499.02

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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.