Home / 11,945.32-16,485.88-6,640.64

Finding the Fourth Proportional to 11,945.32, 16,485.88 and 6,640.64

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Solution

The fourth proportional to 11,945.32, 16,485.88 and 6,640.64 is: 9,164.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.32 : 16,485.88 = 6,640.64 : x
  2. Step 2: Convert to fraction form
    11,945.32/16,485.88 = 6,640.64/x
  3. Step 3: Cross multiply
    11,945.32x = 16,485.88 × 6,640.64
  4. Step 4: Simplify right side
    11,945.32x = 109,476,794.16
  5. Step 5: Solve for x
    x = 109,476,794.16/11,945.32
  6. Step 6: Final answer
    x = 9,164.83

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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.