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Finding the Fourth Proportional to 21,917.03, 32,879.87 and 7,124.99

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Solution

The fourth proportional to 21,917.03, 32,879.87 and 7,124.99 is: 10,688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,917.03 : 32,879.87 = 7,124.99 : x
  2. Step 2: Convert to fraction form
    21,917.03/32,879.87 = 7,124.99/x
  3. Step 3: Cross multiply
    21,917.03x = 32,879.87 × 7,124.99
  4. Step 4: Simplify right side
    21,917.03x = 234,268,744.95
  5. Step 5: Solve for x
    x = 234,268,744.95/21,917.03
  6. Step 6: Final answer
    x = 10,688.89

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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.