Home / 5,420.56-8,135.40-2,135.92

Finding the Fourth Proportional to 5,420.56, 8,135.40 and 2,135.92

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Solution

The fourth proportional to 5,420.56, 8,135.40 and 2,135.92 is: 3,205.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.56 : 8,135.40 = 2,135.92 : x
  2. Step 2: Convert to fraction form
    5,420.56/8,135.40 = 2,135.92/x
  3. Step 3: Cross multiply
    5,420.56x = 8,135.40 × 2,135.92
  4. Step 4: Simplify right side
    5,420.56x = 17,376,563.57
  5. Step 5: Solve for x
    x = 17,376,563.57/5,420.56
  6. Step 6: Final answer
    x = 3,205.68

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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.