Home / 11,439.20-17,168.64-6,518.72

Finding the Fourth Proportional to 11,439.20, 17,168.64 and 6,518.72

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Solution

The fourth proportional to 11,439.20, 17,168.64 and 6,518.72 is: 9,783.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.20 : 17,168.64 = 6,518.72 : x
  2. Step 2: Convert to fraction form
    11,439.20/17,168.64 = 6,518.72/x
  3. Step 3: Cross multiply
    11,439.20x = 17,168.64 × 6,518.72
  4. Step 4: Simplify right side
    11,439.20x = 111,917,556.94
  5. Step 5: Solve for x
    x = 111,917,556.94/11,439.20
  6. Step 6: Final answer
    x = 9,783.69

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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.