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Finding the Fourth Proportional to 21,187.68, 29,232.24 and 12,234

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Solution

The fourth proportional to 21,187.68, 29,232.24 and 12,234 is: 16,879.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.68 : 29,232.24 = 12,234 : x
  2. Step 2: Convert to fraction form
    21,187.68/29,232.24 = 12,234/x
  3. Step 3: Cross multiply
    21,187.68x = 29,232.24 × 12,234
  4. Step 4: Simplify right side
    21,187.68x = 357,627,224.16
  5. Step 5: Solve for x
    x = 357,627,224.16/21,187.68
  6. Step 6: Final answer
    x = 16,879.02

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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.