Home / 20,930.49-28,883.93-11,977.56

Finding the Fourth Proportional to 20,930.49, 28,883.93 and 11,977.56

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Solution

The fourth proportional to 20,930.49, 28,883.93 and 11,977.56 is: 16,528.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.49 : 28,883.93 = 11,977.56 : x
  2. Step 2: Convert to fraction form
    20,930.49/28,883.93 = 11,977.56/x
  3. Step 3: Cross multiply
    20,930.49x = 28,883.93 × 11,977.56
  4. Step 4: Simplify right side
    20,930.49x = 345,958,944.72
  5. Step 5: Solve for x
    x = 345,958,944.72/20,930.49
  6. Step 6: Final answer
    x = 16,528.95

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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.