Home / 13,091.28-18,078.80-11,191.84

Finding the Fourth Proportional to 13,091.28, 18,078.80 and 11,191.84

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Solution

The fourth proportional to 13,091.28, 18,078.80 and 11,191.84 is: 15,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.28 : 18,078.80 = 11,191.84 : x
  2. Step 2: Convert to fraction form
    13,091.28/18,078.80 = 11,191.84/x
  3. Step 3: Cross multiply
    13,091.28x = 18,078.80 × 11,191.84
  4. Step 4: Simplify right side
    13,091.28x = 202,335,036.99
  5. Step 5: Solve for x
    x = 202,335,036.99/13,091.28
  6. Step 6: Final answer
    x = 15,455.71

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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.