Home / 20,268.97-27,970.99-11,315.91

Finding the Fourth Proportional to 20,268.97, 27,970.99 and 11,315.91

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Solution

The fourth proportional to 20,268.97, 27,970.99 and 11,315.91 is: 15,615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.97 : 27,970.99 = 11,315.91 : x
  2. Step 2: Convert to fraction form
    20,268.97/27,970.99 = 11,315.91/x
  3. Step 3: Cross multiply
    20,268.97x = 27,970.99 × 11,315.91
  4. Step 4: Simplify right side
    20,268.97x = 316,517,205.45
  5. Step 5: Solve for x
    x = 316,517,205.45/20,268.97
  6. Step 6: Final answer
    x = 15,615.85

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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.