Home / 20,268.36-27,970.26-11,315.78

Finding the Fourth Proportional to 20,268.36, 27,970.26 and 11,315.78

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Solution

The fourth proportional to 20,268.36, 27,970.26 and 11,315.78 is: 15,615.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.36 : 27,970.26 = 11,315.78 : x
  2. Step 2: Convert to fraction form
    20,268.36/27,970.26 = 11,315.78/x
  3. Step 3: Cross multiply
    20,268.36x = 27,970.26 × 11,315.78
  4. Step 4: Simplify right side
    20,268.36x = 316,505,304.97
  5. Step 5: Solve for x
    x = 316,505,304.97/20,268.36
  6. Step 6: Final answer
    x = 15,615.74

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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.