Home / 20,809.44-28,701.12-13,257.12

Finding the Fourth Proportional to 20,809.44, 28,701.12 and 13,257.12

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Solution

The fourth proportional to 20,809.44, 28,701.12 and 13,257.12 is: 18,284.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.44 : 28,701.12 = 13,257.12 : x
  2. Step 2: Convert to fraction form
    20,809.44/28,701.12 = 13,257.12/x
  3. Step 3: Cross multiply
    20,809.44x = 28,701.12 × 13,257.12
  4. Step 4: Simplify right side
    20,809.44x = 380,494,191.97
  5. Step 5: Solve for x
    x = 380,494,191.97/20,809.44
  6. Step 6: Final answer
    x = 18,284.69

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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.