Home / 20,926.99-28,884.54-11,977.30

Finding the Fourth Proportional to 20,926.99, 28,884.54 and 11,977.30

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Solution

The fourth proportional to 20,926.99, 28,884.54 and 11,977.30 is: 16,531.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.99 : 28,884.54 = 11,977.30 : x
  2. Step 2: Convert to fraction form
    20,926.99/28,884.54 = 11,977.30/x
  3. Step 3: Cross multiply
    20,926.99x = 28,884.54 × 11,977.30
  4. Step 4: Simplify right side
    20,926.99x = 345,958,800.94
  5. Step 5: Solve for x
    x = 345,958,800.94/20,926.99
  6. Step 6: Final answer
    x = 16,531.70

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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.