Home / 13,268.52-18,311.40-8,789.22

Finding the Fourth Proportional to 13,268.52, 18,311.40 and 8,789.22

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Solution

The fourth proportional to 13,268.52, 18,311.40 and 8,789.22 is: 12,129.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,268.52 : 18,311.40 = 8,789.22 : x
  2. Step 2: Convert to fraction form
    13,268.52/18,311.40 = 8,789.22/x
  3. Step 3: Cross multiply
    13,268.52x = 18,311.40 × 8,789.22
  4. Step 4: Simplify right side
    13,268.52x = 160,942,923.11
  5. Step 5: Solve for x
    x = 160,942,923.11/13,268.52
  6. Step 6: Final answer
    x = 12,129.68

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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.