Home / 20,855.49-28,774.85-11,899.77

Finding the Fourth Proportional to 20,855.49, 28,774.85 and 11,899.77

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Solution

The fourth proportional to 20,855.49, 28,774.85 and 11,899.77 is: 16,418.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.49 : 28,774.85 = 11,899.77 : x
  2. Step 2: Convert to fraction form
    20,855.49/28,774.85 = 11,899.77/x
  3. Step 3: Cross multiply
    20,855.49x = 28,774.85 × 11,899.77
  4. Step 4: Simplify right side
    20,855.49x = 342,414,037.29
  5. Step 5: Solve for x
    x = 342,414,037.29/20,855.49
  6. Step 6: Final answer
    x = 16,418.41

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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.