Home / 20,268.20-27,969.21-11,315.49

Finding the Fourth Proportional to 20,268.20, 27,969.21 and 11,315.49

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Solution

The fourth proportional to 20,268.20, 27,969.21 and 11,315.49 is: 15,614.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.20 : 27,969.21 = 11,315.49 : x
  2. Step 2: Convert to fraction form
    20,268.20/27,969.21 = 11,315.49/x
  3. Step 3: Cross multiply
    20,268.20x = 27,969.21 × 11,315.49
  4. Step 4: Simplify right side
    20,268.20x = 316,485,316.06
  5. Step 5: Solve for x
    x = 316,485,316.06/20,268.20
  6. Step 6: Final answer
    x = 15,614.87

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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.