Home / 5,420.88-8,129.64-2,822.40

Finding the Fourth Proportional to 5,420.88, 8,129.64 and 2,822.40

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Solution

The fourth proportional to 5,420.88, 8,129.64 and 2,822.40 is: 4,232.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.88 : 8,129.64 = 2,822.40 : x
  2. Step 2: Convert to fraction form
    5,420.88/8,129.64 = 2,822.40/x
  3. Step 3: Cross multiply
    5,420.88x = 8,129.64 × 2,822.40
  4. Step 4: Simplify right side
    5,420.88x = 22,945,095.94
  5. Step 5: Solve for x
    x = 22,945,095.94/5,420.88
  6. Step 6: Final answer
    x = 4,232.73

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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.