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Finding the Fourth Proportional to 11,420.32, 17,132.32 and 3,520.99

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Solution

The fourth proportional to 11,420.32, 17,132.32 and 3,520.99 is: 5,282.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.32 : 17,132.32 = 3,520.99 : x
  2. Step 2: Convert to fraction form
    11,420.32/17,132.32 = 3,520.99/x
  3. Step 3: Cross multiply
    11,420.32x = 17,132.32 × 3,520.99
  4. Step 4: Simplify right side
    11,420.32x = 60,322,650.54
  5. Step 5: Solve for x
    x = 60,322,650.54/11,420.32
  6. Step 6: Final answer
    x = 5,282.05

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1.5x scale

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.