Home / 20,712.75-31,011.24-11,190.96

Finding the Fourth Proportional to 20,712.75, 31,011.24 and 11,190.96

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Solution

The fourth proportional to 20,712.75, 31,011.24 and 11,190.96 is: 16,755.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.75 : 31,011.24 = 11,190.96 : x
  2. Step 2: Convert to fraction form
    20,712.75/31,011.24 = 11,190.96/x
  3. Step 3: Cross multiply
    20,712.75x = 31,011.24 × 11,190.96
  4. Step 4: Simplify right side
    20,712.75x = 347,045,464.82
  5. Step 5: Solve for x
    x = 347,045,464.82/20,712.75
  6. Step 6: Final answer
    x = 16,755.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.