Home / 13,067.40-18,047.87-8,811.15

Finding the Fourth Proportional to 13,067.40, 18,047.87 and 8,811.15

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Solution

The fourth proportional to 13,067.40, 18,047.87 and 8,811.15 is: 12,169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,067.40 : 18,047.87 = 8,811.15 : x
  2. Step 2: Convert to fraction form
    13,067.40/18,047.87 = 8,811.15/x
  3. Step 3: Cross multiply
    13,067.40x = 18,047.87 × 8,811.15
  4. Step 4: Simplify right side
    13,067.40x = 159,022,489.75
  5. Step 5: Solve for x
    x = 159,022,489.75/13,067.40
  6. Step 6: Final answer
    x = 12,169.41

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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.