Home / 20,760.21-28,649.16-11,328.75

Finding the Fourth Proportional to 20,760.21, 28,649.16 and 11,328.75

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Solution

The fourth proportional to 20,760.21, 28,649.16 and 11,328.75 is: 15,633.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.21 : 28,649.16 = 11,328.75 : x
  2. Step 2: Convert to fraction form
    20,760.21/28,649.16 = 11,328.75/x
  3. Step 3: Cross multiply
    20,760.21x = 28,649.16 × 11,328.75
  4. Step 4: Simplify right side
    20,760.21x = 324,559,171.35
  5. Step 5: Solve for x
    x = 324,559,171.35/20,760.21
  6. Step 6: Final answer
    x = 15,633.71

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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.