Home / 20,385.41-28,131.75-11,310.68

Finding the Fourth Proportional to 20,385.41, 28,131.75 and 11,310.68

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Solution

The fourth proportional to 20,385.41, 28,131.75 and 11,310.68 is: 15,608.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.41 : 28,131.75 = 11,310.68 : x
  2. Step 2: Convert to fraction form
    20,385.41/28,131.75 = 11,310.68/x
  3. Step 3: Cross multiply
    20,385.41x = 28,131.75 × 11,310.68
  4. Step 4: Simplify right side
    20,385.41x = 318,189,292.42
  5. Step 5: Solve for x
    x = 318,189,292.42/20,385.41
  6. Step 6: Final answer
    x = 15,608.68

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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.