Home / 13,187.08-18,198.42-7,218.70

Finding the Fourth Proportional to 13,187.08, 18,198.42 and 7,218.70

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Solution

The fourth proportional to 13,187.08, 18,198.42 and 7,218.70 is: 9,961.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.08 : 18,198.42 = 7,218.70 : x
  2. Step 2: Convert to fraction form
    13,187.08/18,198.42 = 7,218.70/x
  3. Step 3: Cross multiply
    13,187.08x = 18,198.42 × 7,218.70
  4. Step 4: Simplify right side
    13,187.08x = 131,368,934.45
  5. Step 5: Solve for x
    x = 131,368,934.45/13,187.08
  6. Step 6: Final answer
    x = 9,961.94

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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.