Home / 20,440.88-28,207.00-11,489.72

Finding the Fourth Proportional to 20,440.88, 28,207.00 and 11,489.72

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Solution

The fourth proportional to 20,440.88, 28,207.00 and 11,489.72 is: 15,855.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.88 : 28,207.00 = 11,489.72 : x
  2. Step 2: Convert to fraction form
    20,440.88/28,207.00 = 11,489.72/x
  3. Step 3: Cross multiply
    20,440.88x = 28,207.00 × 11,489.72
  4. Step 4: Simplify right side
    20,440.88x = 324,090,667.60
  5. Step 5: Solve for x
    x = 324,090,667.60/20,440.88
  6. Step 6: Final answer
    x = 15,855.03

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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.