Home / 10,822.20-16,221.64-5,279.28

Finding the Fourth Proportional to 10,822.20, 16,221.64 and 5,279.28

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Solution

The fourth proportional to 10,822.20, 16,221.64 and 5,279.28 is: 7,913.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,822.20 : 16,221.64 = 5,279.28 : x
  2. Step 2: Convert to fraction form
    10,822.20/16,221.64 = 5,279.28/x
  3. Step 3: Cross multiply
    10,822.20x = 16,221.64 × 5,279.28
  4. Step 4: Simplify right side
    10,822.20x = 85,638,579.62
  5. Step 5: Solve for x
    x = 85,638,579.62/10,822.20
  6. Step 6: Final answer
    x = 7,913.23

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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.