Home / 11,945.28-16,485.05-6,640.19

Finding the Fourth Proportional to 11,945.28, 16,485.05 and 6,640.19

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Solution

The fourth proportional to 11,945.28, 16,485.05 and 6,640.19 is: 9,163.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.28 : 16,485.05 = 6,640.19 : x
  2. Step 2: Convert to fraction form
    11,945.28/16,485.05 = 6,640.19/x
  3. Step 3: Cross multiply
    11,945.28x = 16,485.05 × 6,640.19
  4. Step 4: Simplify right side
    11,945.28x = 109,463,864.16
  5. Step 5: Solve for x
    x = 109,463,864.16/11,945.28
  6. Step 6: Final answer
    x = 9,163.78

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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.