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Finding the Fourth Proportional to 28,978.23, 43,410.94 and 21,365.64

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Solution

The fourth proportional to 28,978.23, 43,410.94 and 21,365.64 is: 32,006.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.23 : 43,410.94 = 21,365.64 : x
  2. Step 2: Convert to fraction form
    28,978.23/43,410.94 = 21,365.64/x
  3. Step 3: Cross multiply
    28,978.23x = 43,410.94 × 21,365.64
  4. Step 4: Simplify right side
    28,978.23x = 927,502,571.21
  5. Step 5: Solve for x
    x = 927,502,571.21/28,978.23
  6. Step 6: Final answer
    x = 32,006.88

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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.