Home / 5,214.38-7,821.62-1,318.79

Finding the Fourth Proportional to 5,214.38, 7,821.62 and 1,318.79

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Solution

The fourth proportional to 5,214.38, 7,821.62 and 1,318.79 is: 1,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,214.38 : 7,821.62 = 1,318.79 : x
  2. Step 2: Convert to fraction form
    5,214.38/7,821.62 = 1,318.79/x
  3. Step 3: Cross multiply
    5,214.38x = 7,821.62 × 1,318.79
  4. Step 4: Simplify right side
    5,214.38x = 10,315,074.24
  5. Step 5: Solve for x
    x = 10,315,074.24/5,214.38
  6. Step 6: Final answer
    x = 1,978.20

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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.