Home / 5,425.75-8,138.70-1,913.30

Finding the Fourth Proportional to 5,425.75, 8,138.70 and 1,913.30

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Solution

The fourth proportional to 5,425.75, 8,138.70 and 1,913.30 is: 2,869.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.75 : 8,138.70 = 1,913.30 : x
  2. Step 2: Convert to fraction form
    5,425.75/8,138.70 = 1,913.30/x
  3. Step 3: Cross multiply
    5,425.75x = 8,138.70 × 1,913.30
  4. Step 4: Simplify right side
    5,425.75x = 15,571,751.75
  5. Step 5: Solve for x
    x = 15,571,751.75/5,425.75
  6. Step 6: Final answer
    x = 2,869.97

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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.