Home / 5,420.10-8,124.30-2,640.64

Finding the Fourth Proportional to 5,420.10, 8,124.30 and 2,640.64

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Solution

The fourth proportional to 5,420.10, 8,124.30 and 2,640.64 is: 3,958.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.10 : 8,124.30 = 2,640.64 : x
  2. Step 2: Convert to fraction form
    5,420.10/8,124.30 = 2,640.64/x
  3. Step 3: Cross multiply
    5,420.10x = 8,124.30 × 2,640.64
  4. Step 4: Simplify right side
    5,420.10x = 21,453,351.55
  5. Step 5: Solve for x
    x = 21,453,351.55/5,420.10
  6. Step 6: Final answer
    x = 3,958.11

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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.