Home / 20,511.55-30,779.44-8,664.56

Finding the Fourth Proportional to 20,511.55, 30,779.44 and 8,664.56

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Solution

The fourth proportional to 20,511.55, 30,779.44 and 8,664.56 is: 13,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.55 : 30,779.44 = 8,664.56 : x
  2. Step 2: Convert to fraction form
    20,511.55/30,779.44 = 8,664.56/x
  3. Step 3: Cross multiply
    20,511.55x = 30,779.44 × 8,664.56
  4. Step 4: Simplify right side
    20,511.55x = 266,690,379.82
  5. Step 5: Solve for x
    x = 266,690,379.82/20,511.55
  6. Step 6: Final answer
    x = 13,001.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.