Home / 11,115.68-15,336.34-6,399.84

Finding the Fourth Proportional to 11,115.68, 15,336.34 and 6,399.84

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Solution

The fourth proportional to 11,115.68, 15,336.34 and 6,399.84 is: 8,829.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.68 : 15,336.34 = 6,399.84 : x
  2. Step 2: Convert to fraction form
    11,115.68/15,336.34 = 6,399.84/x
  3. Step 3: Cross multiply
    11,115.68x = 15,336.34 × 6,399.84
  4. Step 4: Simplify right side
    11,115.68x = 98,150,122.19
  5. Step 5: Solve for x
    x = 98,150,122.19/11,115.68
  6. Step 6: Final answer
    x = 8,829.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.