Home / 20,455.67-28,229.16-11,381.75

Finding the Fourth Proportional to 20,455.67, 28,229.16 and 11,381.75

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Solution

The fourth proportional to 20,455.67, 28,229.16 and 11,381.75 is: 15,707.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.67 : 28,229.16 = 11,381.75 : x
  2. Step 2: Convert to fraction form
    20,455.67/28,229.16 = 11,381.75/x
  3. Step 3: Cross multiply
    20,455.67x = 28,229.16 × 11,381.75
  4. Step 4: Simplify right side
    20,455.67x = 321,297,241.83
  5. Step 5: Solve for x
    x = 321,297,241.83/20,455.67
  6. Step 6: Final answer
    x = 15,707.00

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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.