Home / 20,709.54-28,578.15-11,755.85

Finding the Fourth Proportional to 20,709.54, 28,578.15 and 11,755.85

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Solution

The fourth proportional to 20,709.54, 28,578.15 and 11,755.85 is: 16,222.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.54 : 28,578.15 = 11,755.85 : x
  2. Step 2: Convert to fraction form
    20,709.54/28,578.15 = 11,755.85/x
  3. Step 3: Cross multiply
    20,709.54x = 28,578.15 × 11,755.85
  4. Step 4: Simplify right side
    20,709.54x = 335,960,301.79
  5. Step 5: Solve for x
    x = 335,960,301.79/20,709.54
  6. Step 6: Final answer
    x = 16,222.49

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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.