Home / 20,713.12-28,584.24-11,281.72

Finding the Fourth Proportional to 20,713.12, 28,584.24 and 11,281.72

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Solution

The fourth proportional to 20,713.12, 28,584.24 and 11,281.72 is: 15,568.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,713.12 : 28,584.24 = 11,281.72 : x
  2. Step 2: Convert to fraction form
    20,713.12/28,584.24 = 11,281.72/x
  3. Step 3: Cross multiply
    20,713.12x = 28,584.24 × 11,281.72
  4. Step 4: Simplify right side
    20,713.12x = 322,479,392.09
  5. Step 5: Solve for x
    x = 322,479,392.09/20,713.12
  6. Step 6: Final answer
    x = 15,568.85

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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.