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Finding the Fourth Proportional to 20,616, 28,450.08 and 11,663.31

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Solution

The fourth proportional to 20,616, 28,450.08 and 11,663.31 is: 16,095.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616 : 28,450.08 = 11,663.31 : x
  2. Step 2: Convert to fraction form
    20,616/28,450.08 = 11,663.31/x
  3. Step 3: Cross multiply
    20,616x = 28,450.08 × 11,663.31
  4. Step 4: Simplify right side
    20,616x = 331,822,102.56
  5. Step 5: Solve for x
    x = 331,822,102.56/20,616
  6. Step 6: Final answer
    x = 16,095.37

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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.