Home / 13,110.82-18,093.38-7,143.05

Finding the Fourth Proportional to 13,110.82, 18,093.38 and 7,143.05

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Solution

The fourth proportional to 13,110.82, 18,093.38 and 7,143.05 is: 9,857.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.82 : 18,093.38 = 7,143.05 : x
  2. Step 2: Convert to fraction form
    13,110.82/18,093.38 = 7,143.05/x
  3. Step 3: Cross multiply
    13,110.82x = 18,093.38 × 7,143.05
  4. Step 4: Simplify right side
    13,110.82x = 129,241,918.01
  5. Step 5: Solve for x
    x = 129,241,918.01/13,110.82
  6. Step 6: Final answer
    x = 9,857.65

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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.