Home / 13,226.15-18,247.29-8,691.27

Finding the Fourth Proportional to 13,226.15, 18,247.29 and 8,691.27

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Solution

The fourth proportional to 13,226.15, 18,247.29 and 8,691.27 is: 11,990.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,226.15 : 18,247.29 = 8,691.27 : x
  2. Step 2: Convert to fraction form
    13,226.15/18,247.29 = 8,691.27/x
  3. Step 3: Cross multiply
    13,226.15x = 18,247.29 × 8,691.27
  4. Step 4: Simplify right side
    13,226.15x = 158,591,989.47
  5. Step 5: Solve for x
    x = 158,591,989.47/13,226.15
  6. Step 6: Final answer
    x = 11,990.79

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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.