Home / 20,760.24-28,649.12-11,328.88

Finding the Fourth Proportional to 20,760.24, 28,649.12 and 11,328.88

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Solution

The fourth proportional to 20,760.24, 28,649.12 and 11,328.88 is: 15,633.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.24 : 28,649.12 = 11,328.88 : x
  2. Step 2: Convert to fraction form
    20,760.24/28,649.12 = 11,328.88/x
  3. Step 3: Cross multiply
    20,760.24x = 28,649.12 × 11,328.88
  4. Step 4: Simplify right side
    20,760.24x = 324,562,442.59
  5. Step 5: Solve for x
    x = 324,562,442.59/20,760.24
  6. Step 6: Final answer
    x = 15,633.85

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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.