Home / 5,214.21-7,821.31-1,318.61

Finding the Fourth Proportional to 5,214.21, 7,821.31 and 1,318.61

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Solution

The fourth proportional to 5,214.21, 7,821.31 and 1,318.61 is: 1,977.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,214.21 : 7,821.31 = 1,318.61 : x
  2. Step 2: Convert to fraction form
    5,214.21/7,821.31 = 1,318.61/x
  3. Step 3: Cross multiply
    5,214.21x = 7,821.31 × 1,318.61
  4. Step 4: Simplify right side
    5,214.21x = 10,313,254.28
  5. Step 5: Solve for x
    x = 10,313,254.28/5,214.21
  6. Step 6: Final answer
    x = 1,977.92

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Similar ratio
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1.5x scale

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.