Home / 20,491.88-28,277.25-11,540.21

Finding the Fourth Proportional to 20,491.88, 28,277.25 and 11,540.21

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Solution

The fourth proportional to 20,491.88, 28,277.25 and 11,540.21 is: 15,924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.88 : 28,277.25 = 11,540.21 : x
  2. Step 2: Convert to fraction form
    20,491.88/28,277.25 = 11,540.21/x
  3. Step 3: Cross multiply
    20,491.88x = 28,277.25 × 11,540.21
  4. Step 4: Simplify right side
    20,491.88x = 326,325,261.84
  5. Step 5: Solve for x
    x = 326,325,261.84/20,491.88
  6. Step 6: Final answer
    x = 15,924.62

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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.