Home / 20,553.28-30,840.72-11,200

Finding the Fourth Proportional to 20,553.28, 30,840.72 and 11,200

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Solution

The fourth proportional to 20,553.28, 30,840.72 and 11,200 is: 16,805.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,553.28 : 30,840.72 = 11,200 : x
  2. Step 2: Convert to fraction form
    20,553.28/30,840.72 = 11,200/x
  3. Step 3: Cross multiply
    20,553.28x = 30,840.72 × 11,200
  4. Step 4: Simplify right side
    20,553.28x = 345,416,064
  5. Step 5: Solve for x
    x = 345,416,064/20,553.28
  6. Step 6: Final answer
    x = 16,805.89

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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.