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Finding the Fourth Proportional to 40,978.14, 61,467.02 and 12,900.58

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Solution

The fourth proportional to 40,978.14, 61,467.02 and 12,900.58 is: 19,350.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,978.14 : 61,467.02 = 12,900.58 : x
  2. Step 2: Convert to fraction form
    40,978.14/61,467.02 = 12,900.58/x
  3. Step 3: Cross multiply
    40,978.14x = 61,467.02 × 12,900.58
  4. Step 4: Simplify right side
    40,978.14x = 792,960,208.87
  5. Step 5: Solve for x
    x = 792,960,208.87/40,978.14
  6. Step 6: Final answer
    x = 19,350.81

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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.