Home / 20,397.05-28,147.48-11,321.88

Finding the Fourth Proportional to 20,397.05, 28,147.48 and 11,321.88

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Solution

The fourth proportional to 20,397.05, 28,147.48 and 11,321.88 is: 15,623.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.05 : 28,147.48 = 11,321.88 : x
  2. Step 2: Convert to fraction form
    20,397.05/28,147.48 = 11,321.88/x
  3. Step 3: Cross multiply
    20,397.05x = 28,147.48 × 11,321.88
  4. Step 4: Simplify right side
    20,397.05x = 318,682,320.69
  5. Step 5: Solve for x
    x = 318,682,320.69/20,397.05
  6. Step 6: Final answer
    x = 15,623.94

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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.