Home / 20,950.22-28,910.57-11,518.71

Finding the Fourth Proportional to 20,950.22, 28,910.57 and 11,518.71

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Solution

The fourth proportional to 20,950.22, 28,910.57 and 11,518.71 is: 15,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.22 : 28,910.57 = 11,518.71 : x
  2. Step 2: Convert to fraction form
    20,950.22/28,910.57 = 11,518.71/x
  3. Step 3: Cross multiply
    20,950.22x = 28,910.57 × 11,518.71
  4. Step 4: Simplify right side
    20,950.22x = 333,012,414.17
  5. Step 5: Solve for x
    x = 333,012,414.17/20,950.22
  6. Step 6: Final answer
    x = 15,895.42

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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.