Home / 5,428.62-8,140.05-2,655.78

Finding the Fourth Proportional to 5,428.62, 8,140.05 and 2,655.78

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Solution

The fourth proportional to 5,428.62, 8,140.05 and 2,655.78 is: 3,982.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.62 : 8,140.05 = 2,655.78 : x
  2. Step 2: Convert to fraction form
    5,428.62/8,140.05 = 2,655.78/x
  3. Step 3: Cross multiply
    5,428.62x = 8,140.05 × 2,655.78
  4. Step 4: Simplify right side
    5,428.62x = 21,618,181.99
  5. Step 5: Solve for x
    x = 21,618,181.99/5,428.62
  6. Step 6: Final answer
    x = 3,982.26

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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.