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Finding the Fourth Proportional to 13,663.92, 20,496 and 5,872.80

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Solution

The fourth proportional to 13,663.92, 20,496 and 5,872.80 is: 8,809.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.92 : 20,496 = 5,872.80 : x
  2. Step 2: Convert to fraction form
    13,663.92/20,496 = 5,872.80/x
  3. Step 3: Cross multiply
    13,663.92x = 20,496 × 5,872.80
  4. Step 4: Simplify right side
    13,663.92x = 120,368,908.80
  5. Step 5: Solve for x
    x = 120,368,908.80/13,663.92
  6. Step 6: Final answer
    x = 8,809.25

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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.