Home / 27,731.06-38,268.30-15,155.90

Finding the Fourth Proportional to 27,731.06, 38,268.30 and 15,155.90

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Solution

The fourth proportional to 27,731.06, 38,268.30 and 15,155.90 is: 20,914.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,731.06 : 38,268.30 = 15,155.90 : x
  2. Step 2: Convert to fraction form
    27,731.06/38,268.30 = 15,155.90/x
  3. Step 3: Cross multiply
    27,731.06x = 38,268.30 × 15,155.90
  4. Step 4: Simplify right side
    27,731.06x = 579,990,527.97
  5. Step 5: Solve for x
    x = 579,990,527.97/27,731.06
  6. Step 6: Final answer
    x = 20,914.83

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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.