Home / 20,891.41-28,830.60-11,459.97

Finding the Fourth Proportional to 20,891.41, 28,830.60 and 11,459.97

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Solution

The fourth proportional to 20,891.41, 28,830.60 and 11,459.97 is: 15,815.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.41 : 28,830.60 = 11,459.97 : x
  2. Step 2: Convert to fraction form
    20,891.41/28,830.60 = 11,459.97/x
  3. Step 3: Cross multiply
    20,891.41x = 28,830.60 × 11,459.97
  4. Step 4: Simplify right side
    20,891.41x = 330,397,811.08
  5. Step 5: Solve for x
    x = 330,397,811.08/20,891.41
  6. Step 6: Final answer
    x = 15,815.01

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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.