Home / 5,214.28-7,821.38-1,318.68

Finding the Fourth Proportional to 5,214.28, 7,821.38 and 1,318.68

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Solution

The fourth proportional to 5,214.28, 7,821.38 and 1,318.68 is: 1,978.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,214.28 : 7,821.38 = 1,318.68 : x
  2. Step 2: Convert to fraction form
    5,214.28/7,821.38 = 1,318.68/x
  3. Step 3: Cross multiply
    5,214.28x = 7,821.38 × 1,318.68
  4. Step 4: Simplify right side
    5,214.28x = 10,313,897.38
  5. Step 5: Solve for x
    x = 10,313,897.38/5,214.28
  6. Step 6: Final answer
    x = 1,978.01

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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.