Home / 20,855.05-28,779.82-11,294.71

Finding the Fourth Proportional to 20,855.05, 28,779.82 and 11,294.71

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Solution

The fourth proportional to 20,855.05, 28,779.82 and 11,294.71 is: 15,586.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.05 : 28,779.82 = 11,294.71 : x
  2. Step 2: Convert to fraction form
    20,855.05/28,779.82 = 11,294.71/x
  3. Step 3: Cross multiply
    20,855.05x = 28,779.82 × 11,294.71
  4. Step 4: Simplify right side
    20,855.05x = 325,059,720.75
  5. Step 5: Solve for x
    x = 325,059,720.75/20,855.05
  6. Step 6: Final answer
    x = 15,586.62

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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.