Home / 13,288.20-18,318.06-9,745.80

Finding the Fourth Proportional to 13,288.20, 18,318.06 and 9,745.80

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Solution

The fourth proportional to 13,288.20, 18,318.06 and 9,745.80 is: 13,434.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.20 : 18,318.06 = 9,745.80 : x
  2. Step 2: Convert to fraction form
    13,288.20/18,318.06 = 9,745.80/x
  3. Step 3: Cross multiply
    13,288.20x = 18,318.06 × 9,745.80
  4. Step 4: Simplify right side
    13,288.20x = 178,524,149.15
  5. Step 5: Solve for x
    x = 178,524,149.15/13,288.20
  6. Step 6: Final answer
    x = 13,434.79

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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.