Home / 11,121.24-15,344.64-7,086.72

Finding the Fourth Proportional to 11,121.24, 15,344.64 and 7,086.72

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Solution

The fourth proportional to 11,121.24, 15,344.64 and 7,086.72 is: 9,777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.24 : 15,344.64 = 7,086.72 : x
  2. Step 2: Convert to fraction form
    11,121.24/15,344.64 = 7,086.72/x
  3. Step 3: Cross multiply
    11,121.24x = 15,344.64 × 7,086.72
  4. Step 4: Simplify right side
    11,121.24x = 108,743,167.18
  5. Step 5: Solve for x
    x = 108,743,167.18/11,121.24
  6. Step 6: Final answer
    x = 9,777.97

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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.