Home / 20,961.50-28,927.68-11,529.86

Finding the Fourth Proportional to 20,961.50, 28,927.68 and 11,529.86

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Solution

The fourth proportional to 20,961.50, 28,927.68 and 11,529.86 is: 15,911.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.50 : 28,927.68 = 11,529.86 : x
  2. Step 2: Convert to fraction form
    20,961.50/28,927.68 = 11,529.86/x
  3. Step 3: Cross multiply
    20,961.50x = 28,927.68 × 11,529.86
  4. Step 4: Simplify right side
    20,961.50x = 333,532,100.52
  5. Step 5: Solve for x
    x = 333,532,100.52/20,961.50
  6. Step 6: Final answer
    x = 15,911.65

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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.