Home / 20,564.87-28,379.30-11,611.85

Finding the Fourth Proportional to 20,564.87, 28,379.30 and 11,611.85

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Solution

The fourth proportional to 20,564.87, 28,379.30 and 11,611.85 is: 16,024.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.87 : 28,379.30 = 11,611.85 : x
  2. Step 2: Convert to fraction form
    20,564.87/28,379.30 = 11,611.85/x
  3. Step 3: Cross multiply
    20,564.87x = 28,379.30 × 11,611.85
  4. Step 4: Simplify right side
    20,564.87x = 329,535,974.75
  5. Step 5: Solve for x
    x = 329,535,974.75/20,564.87
  6. Step 6: Final answer
    x = 16,024.22

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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.