Home / 11,660.72-16,090.44-7,121.12

Finding the Fourth Proportional to 11,660.72, 16,090.44 and 7,121.12

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Solution

The fourth proportional to 11,660.72, 16,090.44 and 7,121.12 is: 9,826.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,660.72 : 16,090.44 = 7,121.12 : x
  2. Step 2: Convert to fraction form
    11,660.72/16,090.44 = 7,121.12/x
  3. Step 3: Cross multiply
    11,660.72x = 16,090.44 × 7,121.12
  4. Step 4: Simplify right side
    11,660.72x = 114,581,954.09
  5. Step 5: Solve for x
    x = 114,581,954.09/11,660.72
  6. Step 6: Final answer
    x = 9,826.32

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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.