Home / 13,187.09-18,198.17-7,218.76

Finding the Fourth Proportional to 13,187.09, 18,198.17 and 7,218.76

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Solution

The fourth proportional to 13,187.09, 18,198.17 and 7,218.76 is: 9,961.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.09 : 18,198.17 = 7,218.76 : x
  2. Step 2: Convert to fraction form
    13,187.09/18,198.17 = 7,218.76/x
  3. Step 3: Cross multiply
    13,187.09x = 18,198.17 × 7,218.76
  4. Step 4: Simplify right side
    13,187.09x = 131,368,130.68
  5. Step 5: Solve for x
    x = 131,368,130.68/13,187.09
  6. Step 6: Final answer
    x = 9,961.88

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Half scale
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Double scale
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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.