Home / 20,930.41-28,884.49-11,980.80

Finding the Fourth Proportional to 20,930.41, 28,884.49 and 11,980.80

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Solution

The fourth proportional to 20,930.41, 28,884.49 and 11,980.80 is: 16,533.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.41 : 28,884.49 = 11,980.80 : x
  2. Step 2: Convert to fraction form
    20,930.41/28,884.49 = 11,980.80/x
  3. Step 3: Cross multiply
    20,930.41x = 28,884.49 × 11,980.80
  4. Step 4: Simplify right side
    20,930.41x = 346,059,210.37
  5. Step 5: Solve for x
    x = 346,059,210.37/20,930.41
  6. Step 6: Final answer
    x = 16,533.80

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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.