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Finding the Fourth Proportional to 20,751.46, 28,635.09 and 11,797.21

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Solution

The fourth proportional to 20,751.46, 28,635.09 and 11,797.21 is: 16,279.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.46 : 28,635.09 = 11,797.21 : x
  2. Step 2: Convert to fraction form
    20,751.46/28,635.09 = 11,797.21/x
  3. Step 3: Cross multiply
    20,751.46x = 28,635.09 × 11,797.21
  4. Step 4: Simplify right side
    20,751.46x = 337,814,111.11
  5. Step 5: Solve for x
    x = 337,814,111.11/20,751.46
  6. Step 6: Final answer
    x = 16,279.06

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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.