Home / 13,111.05-18,093.19-7,142.97

Finding the Fourth Proportional to 13,111.05, 18,093.19 and 7,142.97

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Solution

The fourth proportional to 13,111.05, 18,093.19 and 7,142.97 is: 9,857.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.05 : 18,093.19 = 7,142.97 : x
  2. Step 2: Convert to fraction form
    13,111.05/18,093.19 = 7,142.97/x
  3. Step 3: Cross multiply
    13,111.05x = 18,093.19 × 7,142.97
  4. Step 4: Simplify right side
    13,111.05x = 129,239,113.37
  5. Step 5: Solve for x
    x = 129,239,113.37/13,111.05
  6. Step 6: Final answer
    x = 9,857.27

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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.