Home / 10,327.32-15,481.26-5,128.20

Finding the Fourth Proportional to 10,327.32, 15,481.26 and 5,128.20

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Solution

The fourth proportional to 10,327.32, 15,481.26 and 5,128.20 is: 7,687.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,327.32 : 15,481.26 = 5,128.20 : x
  2. Step 2: Convert to fraction form
    10,327.32/15,481.26 = 5,128.20/x
  3. Step 3: Cross multiply
    10,327.32x = 15,481.26 × 5,128.20
  4. Step 4: Simplify right side
    10,327.32x = 79,390,997.53
  5. Step 5: Solve for x
    x = 79,390,997.53/10,327.32
  6. Step 6: Final answer
    x = 7,687.47

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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.