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Finding the Fourth Proportional to 21,604.32, 29,814.96 and 12,173.28

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Solution

The fourth proportional to 21,604.32, 29,814.96 and 12,173.28 is: 16,799.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,604.32 : 29,814.96 = 12,173.28 : x
  2. Step 2: Convert to fraction form
    21,604.32/29,814.96 = 12,173.28/x
  3. Step 3: Cross multiply
    21,604.32x = 29,814.96 × 12,173.28
  4. Step 4: Simplify right side
    21,604.32x = 362,945,856.27
  5. Step 5: Solve for x
    x = 362,945,856.27/21,604.32
  6. Step 6: Final answer
    x = 16,799.69

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.