Home / 10,220.72-15,331.28-2,825.20

Finding the Fourth Proportional to 10,220.72, 15,331.28 and 2,825.20

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Solution

The fourth proportional to 10,220.72, 15,331.28 and 2,825.20 is: 4,237.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,220.72 : 15,331.28 = 2,825.20 : x
  2. Step 2: Convert to fraction form
    10,220.72/15,331.28 = 2,825.20/x
  3. Step 3: Cross multiply
    10,220.72x = 15,331.28 × 2,825.20
  4. Step 4: Simplify right side
    10,220.72x = 43,313,932.26
  5. Step 5: Solve for x
    x = 43,313,932.26/10,220.72
  6. Step 6: Final answer
    x = 4,237.86

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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.