Home / 20,917.68-31,381.96-7,773.84

Finding the Fourth Proportional to 20,917.68, 31,381.96 and 7,773.84

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Solution

The fourth proportional to 20,917.68, 31,381.96 and 7,773.84 is: 11,662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.68 : 31,381.96 = 7,773.84 : x
  2. Step 2: Convert to fraction form
    20,917.68/31,381.96 = 7,773.84/x
  3. Step 3: Cross multiply
    20,917.68x = 31,381.96 × 7,773.84
  4. Step 4: Simplify right side
    20,917.68x = 243,958,335.93
  5. Step 5: Solve for x
    x = 243,958,335.93/20,917.68
  6. Step 6: Final answer
    x = 11,662.78

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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.