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Finding the Fourth Proportional to 23,979.05, 35,978.94 and 12,872.77

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Solution

The fourth proportional to 23,979.05, 35,978.94 and 12,872.77 is: 19,314.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,979.05 : 35,978.94 = 12,872.77 : x
  2. Step 2: Convert to fraction form
    23,979.05/35,978.94 = 12,872.77/x
  3. Step 3: Cross multiply
    23,979.05x = 35,978.94 × 12,872.77
  4. Step 4: Simplify right side
    23,979.05x = 463,148,596.98
  5. Step 5: Solve for x
    x = 463,148,596.98/23,979.05
  6. Step 6: Final answer
    x = 19,314.72

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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.