Home / 5,318.74-7,977.94-1,620.81

Finding the Fourth Proportional to 5,318.74, 7,977.94 and 1,620.81

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Solution

The fourth proportional to 5,318.74, 7,977.94 and 1,620.81 is: 2,431.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.74 : 7,977.94 = 1,620.81 : x
  2. Step 2: Convert to fraction form
    5,318.74/7,977.94 = 1,620.81/x
  3. Step 3: Cross multiply
    5,318.74x = 7,977.94 × 1,620.81
  4. Step 4: Simplify right side
    5,318.74x = 12,930,724.93
  5. Step 5: Solve for x
    x = 12,930,724.93/5,318.74
  6. Step 6: Final answer
    x = 2,431.16

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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.