Home / 11,739.92-17,612.75-3,420

Finding the Fourth Proportional to 11,739.92, 17,612.75 and 3,420

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Solution

The fourth proportional to 11,739.92, 17,612.75 and 3,420 is: 5,130.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,739.92 : 17,612.75 = 3,420 : x
  2. Step 2: Convert to fraction form
    11,739.92/17,612.75 = 3,420/x
  3. Step 3: Cross multiply
    11,739.92x = 17,612.75 × 3,420
  4. Step 4: Simplify right side
    11,739.92x = 60,235,613.55
  5. Step 5: Solve for x
    x = 60,235,613.55/11,739.92
  6. Step 6: Final answer
    x = 5,130.84

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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.