Home / 20,779.50-28,676.94-11,827.38

Finding the Fourth Proportional to 20,779.50, 28,676.94 and 11,827.38

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Solution

The fourth proportional to 20,779.50, 28,676.94 and 11,827.38 is: 16,322.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.50 : 28,676.94 = 11,827.38 : x
  2. Step 2: Convert to fraction form
    20,779.50/28,676.94 = 11,827.38/x
  3. Step 3: Cross multiply
    20,779.50x = 28,676.94 × 11,827.38
  4. Step 4: Simplify right side
    20,779.50x = 339,173,066.62
  5. Step 5: Solve for x
    x = 339,173,066.62/20,779.50
  6. Step 6: Final answer
    x = 16,322.48

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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.