Home / 20,680.41-28,538.37-11,728.74

Finding the Fourth Proportional to 20,680.41, 28,538.37 and 11,728.74

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Solution

The fourth proportional to 20,680.41, 28,538.37 and 11,728.74 is: 16,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.41 : 28,538.37 = 11,728.74 : x
  2. Step 2: Convert to fraction form
    20,680.41/28,538.37 = 11,728.74/x
  3. Step 3: Cross multiply
    20,680.41x = 28,538.37 × 11,728.74
  4. Step 4: Simplify right side
    20,680.41x = 334,719,121.75
  5. Step 5: Solve for x
    x = 334,719,121.75/20,680.41
  6. Step 6: Final answer
    x = 16,185.32

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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.