Home / 11,115.36-15,342.21-6,639.30

Finding the Fourth Proportional to 11,115.36, 15,342.21 and 6,639.30

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Solution

The fourth proportional to 11,115.36, 15,342.21 and 6,639.30 is: 9,164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.36 : 15,342.21 = 6,639.30 : x
  2. Step 2: Convert to fraction form
    11,115.36/15,342.21 = 6,639.30/x
  3. Step 3: Cross multiply
    11,115.36x = 15,342.21 × 6,639.30
  4. Step 4: Simplify right side
    11,115.36x = 101,861,534.85
  5. Step 5: Solve for x
    x = 101,861,534.85/11,115.36
  6. Step 6: Final answer
    x = 9,164.03

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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.