Home / 5,426.28-8,138.88-2,142

Finding the Fourth Proportional to 5,426.28, 8,138.88 and 2,142

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Solution

The fourth proportional to 5,426.28, 8,138.88 and 2,142 is: 3,212.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,426.28 : 8,138.88 = 2,142 : x
  2. Step 2: Convert to fraction form
    5,426.28/8,138.88 = 2,142/x
  3. Step 3: Cross multiply
    5,426.28x = 8,138.88 × 2,142
  4. Step 4: Simplify right side
    5,426.28x = 17,433,480.96
  5. Step 5: Solve for x
    x = 17,433,480.96/5,426.28
  6. Step 6: Final answer
    x = 3,212.79

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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.